{"action":"Upgrade github.com/traefik/traefik/v3 to 3.7.3 or later.","affected":[{"fixed":"3.7.3","introduced":"3.7.0"}],"component":"github.com/traefik/traefik/v3","cve_ids":["CVE-2026-48491"],"ecosystem":"Go","epss":0.00357,"exploited":false,"fixed_versions":["3.7.3"],"ghsa_id":"GHSA-5r4w-85f3-pw66","id":"tcs_01M5KEYR40WT5Y8ZMBE83K4THD","modified_at":"2026-09-02T15:45:19.838193649Z","published_at":"2026-06-16T19:02:20Z","references":["https://osv.dev/vulnerability/GHSA-5r4w-85f3-pw66","https://github.com/traefik/traefik/security/advisories/GHSA-5r4w-85f3-pw66","https://nvd.nist.gov/vuln/detail/CVE-2026-48491","https://access.redhat.com/errata/RHSA-2026:62260","https://access.redhat.com/security/cve/CVE-2026-48491","https://bugzilla.redhat.com/show_bug.cgi?id=2491923","https://github.com/traefik/traefik","https://github.com/traefik/traefik/releases/tag/v2.11.48","https://github.com/traefik/traefik/releases/tag/v3.6.19","https://github.com/traefik/traefik/releases/tag/v3.7.3","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48491.json"],"severity":{"label":"critical","score":10},"sources":[{"source":"osv","source_id":"GHSA-5r4w-85f3-pw66#Go/github.com/traefik/traefik/v3","url":"https://osv.dev/vulnerability/GHSA-5r4w-85f3-pw66"}],"summary":"Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass"}