{"id":"CVE-2026-113440","aliases":["EEF-CVE-2026-113440","EUVD-2026-109835","GHSA-m347-hm9w-wwv9"],"status":"published","title":"HTTP/1.1 and HTTP/2 redirects resend basic_auth and cookie to a different scheme or port in hackney","description":"Insufficiently Protected Credentials vulnerability in hackney in benoitc hackney allows a redirecting server to obtain the basic_auth and cookie credentials of a request via a same-host redirect to another scheme or port. With follow_redirect enabled, hackney:follow_redirect/10 in src/hackney.erl reissues the request to the Location target after hackney:maybe_strip_auth_on_redirect/3, which compared only the hostname of the current and the redirect URL. A redirect from https to http on the same host resent the Authorization and Cookie headers in cleartext, where an on-path attacker can read them, and a redirect to another port on the same host handed them to a different service. location_trusted forwards credentials to any target by design and is unchanged.\n\nThis issue affects hackney: from 2.0.0 before 4.9.0.","severity":{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00313,"percentile":0.24565,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-522"],"published":"2026-10-26T13:49:17Z","modified":"2026-11-04T02:30:35Z","fixes":[{"ecosystem":"Hex","package":"hackney","fixed_in":["4.9.0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Hex","package":"hackney","ranges":[{"type":"SEMVER","events":[{"introduced":"2.0.0"},{"fixed":"4.9.0"}]}],"versions":["2.0.0","2.0.1","3.0.0","3.0.1","3.0.2","3.0.3","3.1.0","3.1.1","3.1.2","3.2.0","3.2.1","4.0.0","4.0.1","4.0.2","4.0.3","4.1.0","4.2.0","4.2.1","4.2.2","4.2.3","4.3.0","4.4.0","4.4.1","4.4.2","4.4.3","4.4.5","4.5.0","4.5.1","4.5.2","4.6.0","4.6.1","4.7.0","4.7.1","4.7.2","4.7.3","4.7.4","4.8.0","4.8.1","4.8.2","4.8.3","4.8.4","4.8.5","4.8.6","4.8.7"]}],"products":[{"vendor":"benoitc","product":"hackney"},{"vendor":"hackney","product":"hackney"}],"references":[{"url":"https://github.com/benoitc/hackney/pull/979","tags":["related","fix","web"]},{"url":"https://cna.erlef.org/cves/CVE-2026-113440.html","tags":["related","web"]},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-113440","tags":["related","web"]},{"url":"https://github.com/benoitc/hackney/releases/tag/4.9.0","tags":["vendor-advisory","related","advisory"]},{"url":"https://github.com/benoitc/hackney/commit/8f944559bdb83da60b5c06f6cf6d842591278364","tags":["related","fix","web"]},{"url":"https://github.com/benoitc/hackney/commit/6548384b22ea196023a1963e2967d5715b6d9564","tags":["patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113440","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m347-hm9w-wwv9"},{"url":"https://github.com","tags":["web"]},{"url":"https://repo.hex.pm","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113440.json","tags":["advisory"]},{"url":"https://github.com/benoitc/hackney","tags":["package"]},{"url":"https://hex.pm/packages/hackney","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-113440","title":"HTTP/1.1 and HTTP/2 redirects resend basic_auth and cookie to a different scheme or port in hackney","description":"Insufficiently Protected Credentials vulnerability in hackney in benoitc hackney allows a redirecting server to obtain the basic_auth and cookie credentials of a request via a same-host redirect to another scheme or port. With follow_redirect enabled, hackney:follow_redirect/10 in src/hackney.erl reissues the request to the Location target after hackney:maybe_strip_auth_on_redirect/3, which compared only the hostname of the current and the redirect URL. A redirect from https to http on the same host resent the Authorization and Cookie headers in cleartext, where an on-path attacker can read them, and a redirect to another port on the same host handed them to a different service. location_trusted forwards credentials to any target by design and is unchanged.\n\nThis issue affects hackney: from 2.0.0 before 4.9.0.","status":"published","published":"2026-10-26T13:49:17.377Z","modified":"2026-11-02T21:11:47.935Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-522"],"updated_at":"2026-11-03T00:01:30.510858Z"}],"euvd":[{"id":"EUVD-2026-109835","description":"Insufficiently Protected Credentials vulnerability in hackney in benoitc hackney allows a redirecting server to obtain the basic_auth and cookie credentials of a request via a same-host redirect to another scheme or port. With follow_redirect enabled, hackney:follow_redirect/10 in src/hackney.erl reissues the request to the Location target after hackney:maybe_strip_auth_on_redirect/3, which compared only the hostname of the current and the redirect URL. A redirect from https to http on the same host resent the Authorization and Cookie headers in cleartext, where an on-path attacker can read them, and a redirect to another port on the same host handed them to a different service. location_trusted forwards credentials to any target by design and is unchanged.\n\nThis issue affects hackney: from 2.0.0 before 4.9.0.","status":"published","published":"2026-10-26T13:49:17Z","modified":"2026-11-02T21:11:47Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-03T05:08:36.865312Z"}],"ghsa":[{"id":"GHSA-m347-hm9w-wwv9","title":"Insufficiently Protected Credentials vulnerability in hackney in benoitc hackney allows a...","description":"Insufficiently Protected Credentials vulnerability in hackney in benoitc hackney allows a redirecting server to obtain the basic_auth and cookie credentials of a request via a same-host redirect to another scheme or port. With follow_redirect enabled, hackney:follow_redirect/10 in src/hackney.erl reissues the request to the Location target after hackney:maybe_strip_auth_on_redirect/3, which compared only the hostname of the current and the redirect URL. A redirect from https to http on the same host resent the Authorization and Cookie headers in cleartext, where an on-path attacker can read them, and a redirect to another port on the same host handed them to a different service. location_trusted forwards credentials to any target by design and is unchanged.\n\nThis issue affects hackney: from 2.0.0 before 4.9.0.","status":"published","published":"2026-10-26T15:34:40Z","modified":"2026-10-26T15:34:47Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/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":"medium"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T15:14:23.996006Z"}],"nvd":[{"id":"CVE-2026-113440","description":"Insufficiently Protected Credentials vulnerability in hackney in benoitc hackney allows a redirecting server to obtain the basic_auth and cookie credentials of a request via a same-host redirect to another scheme or port. With follow_redirect enabled, hackney:follow_redirect/10 in src/hackney.erl reissues the request to the Location target after hackney:maybe_strip_auth_on_redirect/3, which compared only the hostname of the current and the redirect URL. A redirect from https to http on the same host resent the Authorization and Cookie headers in cleartext, where an on-path attacker can read them, and a redirect to another port on the same host handed them to a different service. location_trusted forwards credentials to any target by design and is unchanged.\n\nThis issue affects hackney: from 2.0.0 before 4.9.0.","status":"published","published":"2026-10-26T14:16:28.887Z","modified":"2026-11-02T22:17:18.147Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/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":"medium","assessor":"secondary"}],"cwes":["CWE-522"],"updated_at":"2026-11-03T00:02:35.749072Z"}],"osv":[{"id":"CVE-2026-113440","title":"HTTP/1.1 and HTTP/2 redirects resend basic_auth and cookie to a different scheme or port in hackney","description":"Insufficiently Protected Credentials vulnerability in hackney in benoitc hackney allows a redirecting server to obtain the basic_auth and cookie credentials of a request via a same-host redirect to another scheme or port. With follow_redirect enabled, hackney:follow_redirect/10 in src/hackney.erl reissues the request to the Location target after hackney:maybe_strip_auth_on_redirect/3, which compared only the hostname of the current and the redirect URL. A redirect from https to http on the same host resent the Authorization and Cookie headers in cleartext, where an on-path attacker can read them, and a redirect to another port on the same host handed them to a different service. location_trusted forwards credentials to any target by design and is unchanged.\n\nThis issue affects hackney: from 2.0.0 before 4.9.0.","status":"published","published":"2026-10-26T13:49:17.377Z","modified":"2026-11-11T10:47:23.775158093Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-522"],"updated_at":"2026-11-11T03:22:00.901153Z"},{"id":"EEF-CVE-2026-113440","title":"HTTP/1.1 and HTTP/2 redirects resend basic_auth and cookie to a different scheme or port in hackney","description":"## Summary\n\nInsufficiently Protected Credentials vulnerability in `hackney` in benoitc hackney allows a redirecting server to obtain the `basic_auth` and `cookie` credentials of a request via a same-host redirect to another scheme or port. With `follow_redirect` enabled, `hackney:follow_redirect/10` in `src/hackney.erl` reissues the request to the `Location` target after `hackney:maybe_strip_auth_on_redirect/3`, which compared only the hostname of the current and the redirect URL. A redirect from `https` to `http` on the same host resent the `Authorization` and `Cookie` headers in cleartext, where an on-path attacker can read them, and a redirect to another port on the same host handed them to a different service. `location_trusted` forwards credentials to any target by design and is unchanged.\n\nThis issue affects hackney: from 2.0.0 before 4.9.0.\n\n## Details\n\n**1. Redirect handling.** With `follow_redirect` set, `hackney:request/5` hands a 3xx response to `hackney:follow_redirect/10` in `src/hackney.erl`, which resolves the `Location` header against the current URL and calls `hackney:request/5` again with the caller's options and an empty header list. HTTP/1.1 and HTTP/2 share this path.\n\n**2. Host-only comparison.** Before the new request, `hackney:maybe_strip_auth_on_redirect/3` removes the `basic_auth` and `cookie` options when the redirect leaves the current host, unless `location_trusted` is set. It compared `#hackney_url.host` of the two URLs.\n\n**3. Consequence.** A redirect that keeps the hostname but changes the scheme or the port passes the check, so the new request carries the same `Authorization` and `Cookie` headers. From `https` to `http` they travel in cleartext; to another port they reach a different service on the same host.\n\n## Impact\n\nA server that answers a credentialed request with a same-host redirect to plain HTTP exposes the client's `Authorization` and `Cookie` headers to anyone on the network path, and a redirect to another port delivers them to whatever service listens there. The captured values can be replayed against the original origin.\n\n## Workarounds\n\nDisable `follow_redirect` and handle the `Location` header in the application, or pass the credentials as explicit `Authorization` and `Cookie` request headers instead of the `basic_auth` and `cookie` options. `hackney:follow_redirect/10` issues the redirected request with an empty header list, so explicit headers reach the first server only.\n\n## Configurations\n\nThe request is made with `follow_redirect` enabled and the `basic_auth` or `cookie` option set, over HTTP/1.1 or HTTP/2, without `location_trusted`. Credentials passed as explicit request headers are not forwarded on redirects and are not affected.","status":"published","published":"2026-10-26T13:49:17.377Z","modified":"2026-10-26T14:00:06.507819004Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T15:46:33.047032Z"}]}}