{"id":"GHSA-5423-jcjm-2gpv","aliases":["GO-2025-3627"],"status":"published","title":"Traefik affected by Go HTTP Request Smuggling Vulnerability","description":"### Summary\nnet/http: request smuggling through invalid chunked data: The net/http package accepts data in the chunked transfer encoding containing an invalid chunk-size line terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a bare LF in a chunk extension as part of the extension, this could permit request smuggling. [CVE-2025-22871] Vendor Affected Components: Go: 1.23.x \u003c 1.23.8\n\nMore Details: [CVE-2025-22871](https://nvd.nist.gov/vuln/detail/CVE-2025-22871)\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.24\n- https://github.com/traefik/traefik/releases/tag/v3.3.6\n- https://github.com/traefik/traefik/releases/tag/v3.4.0-rc2","severity":{"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","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1395"],"published":"2025-04-18T19:35:17Z","modified":"2026-03-03T04:56:31Z","fixes":[{"ecosystem":"Go","package":"github.com/traefik/traefik/v2","fixed_in":["2.11.24"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/traefik/traefik/v3","fixed_in":["3.3.6","3.4.0-rc2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/traefik/traefik/v2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11.24"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.6"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0-rc1"},{"last_affected":"3.4.0-rc1"},{"fixed":"3.4.0-rc2"}]}],"versions":["3.4.0-rc1"]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.11.24"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.3.6"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"3.4.0-rc1"},{"fixed":"3.4.0-rc2"}]}],"versions":["3.4.0-rc1"]},{"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":"0"},{"fixed":"2.11.24"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.3.6"},{"introduced":"3.4.0-rc1"},{"fixed":"3.4.0-rc2"}]}]}],"references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-5423-jcjm-2gpv","tags":["web","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-22871","tags":["advisory","web"]},{"url":"https://github.com/traefik/traefik/releases/tag/v2.11.24","tags":["web"]},{"url":"https://github.com/traefik/traefik/releases/tag/v3.3.6","tags":["web"]},{"url":"https://github.com/traefik/traefik/releases/tag/v3.4.0-rc2","tags":["web"]},{"url":"https://github.com/advisories/GHSA-5423-jcjm-2gpv"},{"url":"https://github.com/traefik/traefik","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-5423-jcjm-2gpv","title":"Traefik affected by Go HTTP Request Smuggling Vulnerability","description":"### Summary\nnet/http: request smuggling through invalid chunked data: The net/http package accepts data in the chunked transfer encoding containing an invalid chunk-size line terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a bare LF in a chunk extension as part of the extension, this could permit request smuggling. [CVE-2025-22871] Vendor Affected Components: Go: 1.23.x \u003c 1.23.8\n\nMore Details: [CVE-2025-22871](https://nvd.nist.gov/vuln/detail/CVE-2025-22871)\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.24\n- https://github.com/traefik/traefik/releases/tag/v3.3.6\n- https://github.com/traefik/traefik/releases/tag/v3.4.0-rc2","status":"published","published":"2025-04-18T19:35:17Z","modified":"2025-04-18T19:35:18Z","cvss":[{"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"}],"cwes":["CWE-1395"],"updated_at":"2026-11-02T14:38:40.628275Z"}],"osv":[{"id":"GHSA-5423-jcjm-2gpv","title":"Traefik affected by Go HTTP Request Smuggling Vulnerability","description":"### Summary\nnet/http: request smuggling through invalid chunked data: The net/http package accepts data in the chunked transfer encoding containing an invalid chunk-size line terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a bare LF in a chunk extension as part of the extension, this could permit request smuggling. [CVE-2025-22871] Vendor Affected Components: Go: 1.23.x \u003c 1.23.8\n\nMore Details: [CVE-2025-22871](https://nvd.nist.gov/vuln/detail/CVE-2025-22871)\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.24\n- https://github.com/traefik/traefik/releases/tag/v3.3.6\n- https://github.com/traefik/traefik/releases/tag/v3.4.0-rc2","status":"published","published":"2025-04-18T19:35:17Z","modified":"2025-04-22T18:57:14.621918Z","cvss":[{"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"}],"cwes":["CWE-1395"],"updated_at":"2026-11-02T15:46:37.864461Z"},{"id":"GO-2025-3627","title":"Traefik affected by Go HTTP Request Smuggling Vulnerability in github.com/traefik/traefik","description":"Traefik affected by Go HTTP Request Smuggling Vulnerability in github.com/traefik/traefik","status":"published","published":"2025-04-22T18:14:45Z","modified":"2026-03-03T04:56:31.085358Z","updated_at":"2026-11-02T15:47:01.728182Z"}]}}