{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"github.com/traefik/traefik","cve_ids":["CVE-2026-39858"],"ecosystem":"Go","epss":0.00479,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-5m6w-wvh7-57vm","id":"tcs_01M5KGJ72Z77V39JVG68P06XEX","modified_at":"2026-06-25T18:45:26.695617307Z","published_at":"2026-06-25T18:26:48Z","references":["https://osv.dev/vulnerability/GO-2026-5149","https://github.com/traefik/traefik/security/advisories/GHSA-5m6w-wvh7-57vm","https://nvd.nist.gov/vuln/detail/CVE-2026-39858","https://github.com/traefik/traefik/releases/tag/v2.11.43","https://github.com/traefik/traefik/releases/tag/v3.6.14","https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2"],"severity":{"label":"critical","score":10},"sources":[{"source":"osv","source_id":"GO-2026-5149","url":"https://osv.dev/vulnerability/GO-2026-5149"},{"source":"nvd","source_id":"CVE-2026-39858","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39858"}],"summary":"Traefik: Pre-authentication decision bypass due to forwarded alias spoofing in github.com/traefik/traefik"}