{"id":"GHSA-gv8r-9rw9-9697","aliases":["GO-2026-4530"],"status":"published","title":"Traefik affected by TLS ClientAuth Bypass on HTTP/3","description":"### Summary\n\nThere is a potential vulnerability in Traefik managing HTTP/3 connections.\n\nMore details in the [CVE-2025-68121](https://nvd.nist.gov/vuln/detail/CVE-2025-68121).\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.37\n- https://github.com/traefik/traefik/releases/tag/v3.6.8\n\n## Workarounds\n\nNo workaround\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).","severity":{"version":"4.0","score":7.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1395"],"published":"2026-02-20T21:14:27Z","modified":"2026-03-13T10:47:38Z","fixes":[{"ecosystem":"Go","package":"github.com/traefik/traefik/v2","fixed_in":["2.11.37"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/traefik/traefik/v3","fixed_in":["3.6.8"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/traefik/traefik","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.7.34"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/traefik/traefik/v2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.11.36"},{"fixed":"2.11.37"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.6.7"},{"fixed":"3.6.8"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"1.7.34"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.11.37"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.6.8"}]}]},{"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":"2.11.37"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/traefik/traefik/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.6.8"}]}]}],"references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-gv8r-9rw9-9697","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-gv8r-9rw9-9697"},{"url":"https://github.com/traefik/traefik","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-gv8r-9rw9-9697","title":"Traefik affected by TLS ClientAuth Bypass on HTTP/3","description":"### Summary\n\nThere is a potential vulnerability in Traefik managing HTTP/3 connections.\n\nMore details in the [CVE-2025-68121](https://nvd.nist.gov/vuln/detail/CVE-2025-68121).\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.37\n- https://github.com/traefik/traefik/releases/tag/v3.6.8\n\n## Workarounds\n\nNo workaround\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).","status":"published","published":"2026-02-20T21:14:27Z","modified":"2026-03-11T20:35:10Z","cvss":[{"version":"4.0","score":7.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high"},{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-1395"],"updated_at":"2026-11-02T14:39:34.616253Z"}],"osv":[{"id":"GHSA-gv8r-9rw9-9697","title":"Traefik affected by TLS ClientAuth Bypass on HTTP/3","description":"### Summary\n\nThere is a potential vulnerability in Traefik managing HTTP/3 connections.\n\nMore details in the [CVE-2025-68121](https://nvd.nist.gov/vuln/detail/CVE-2025-68121).\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.37\n- https://github.com/traefik/traefik/releases/tag/v3.6.8\n\n## Workarounds\n\nNo workaround\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).","status":"published","published":"2026-02-20T21:14:27Z","modified":"2026-03-13T10:47:38.380633Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"},{"version":"4.0","score":7.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","level":"high"}],"cwes":["CWE-1395"],"updated_at":"2026-11-02T15:46:48.191583Z"},{"id":"GO-2026-4530","title":"Traefik affected by TLS ClientAuth Bypass on HTTP/3 in github.com/traefik/traefik","description":"Traefik affected by TLS ClientAuth Bypass on HTTP/3 in github.com/traefik/traefik","status":"published","published":"2026-02-23T18:23:15Z","modified":"2026-02-23T19:26:21.549095Z","updated_at":"2026-11-02T15:47:02.280725Z"}]}}