{"action":"Upgrade github.com/traefik/traefik/v2 to 2.11.51 or later.","affected":[{"fixed":"2.11.51","introduced":"0"}],"component":"github.com/traefik/traefik/v2","cve_ids":["CVE-2026-54763"],"ecosystem":"Go","epss":0.00239,"exploited":false,"fixed_versions":["2.11.51"],"ghsa_id":"GHSA-x677-9fxg-v5c5","id":"tcs_01M5KFRNHFP94H8181PTDNTSM6","modified_at":"2026-08-18T15:11:00.208827242Z","published_at":"2026-08-06T16:53:53Z","references":["https://osv.dev/vulnerability/GHSA-x677-9fxg-v5c5","https://github.com/traefik/traefik/security/advisories/GHSA-x677-9fxg-v5c5","https://nvd.nist.gov/vuln/detail/CVE-2026-54763","https://github.com/traefik/traefik/pull/13262","https://github.com/traefik/traefik/commit/108a5264473a2cbc8f12d6d691a3c6553cdf2c1b","https://github.com/traefik/traefik","https://github.com/traefik/traefik/releases/tag/v2.11.51","https://github.com/traefik/traefik/releases/tag/v3.6.22","https://github.com/traefik/traefik/releases/tag/v3.7.6"],"severity":{"label":"high"},"sources":[{"source":"osv","source_id":"GHSA-x677-9fxg-v5c5","url":"https://osv.dev/vulnerability/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"}