{"schema_version":"1.3.1","id":"GO-2026-6211","modified":"2026-08-18T14:32:29Z","published":"2026-08-18T14:32:29Z","aliases":["CVE-2026-54763","GHSA-x677-9fxg-v5c5"],"summary":"Traefik: Incomplete fix for CVE-2026-33433 + CVE-2026-39858 cross-cohort: headerField underscore-variant identity spoofing in BasicAuth / DigestAuth / ForwardAuth in github.com/traefik/traefik","details":"Traefik: Incomplete fix for CVE-2026-33433 + CVE-2026-39858 cross-cohort: headerField underscore-variant identity spoofing in BasicAuth / DigestAuth / ForwardAuth in github.com/traefik/traefik","affected":[{"package":{"name":"github.com/traefik/traefik","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"ecosystem_specific":{}},{"package":{"name":"github.com/traefik/traefik/v2","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.11.51"}]}],"ecosystem_specific":{}},{"package":{"name":"github.com/traefik/traefik/v3","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.6.22"},{"introduced":"3.7.0"},{"fixed":"3.7.6"}]}],"ecosystem_specific":{}}],"references":[{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-x677-9fxg-v5c5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54763"},{"type":"FIX","url":"https://github.com/traefik/traefik/commit/108a5264473a2cbc8f12d6d691a3c6553cdf2c1b"},{"type":"FIX","url":"https://github.com/traefik/traefik/pull/13262"},{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v2.11.51"},{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.6.22"},{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.7.6"}],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-6211","review_status":"UNREVIEWED"}}