Go/github.com/traefik/traefik/v3 CVE-2026-48491: critical 10, EPSS 0.36%

Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass

Action: Upgrade github.com/traefik/traefik/v3 to 3.7.3 or later.

go get github.com/traefik/traefik/v3@v3.7.3

Affected

Fixed versions

Sources

• osv: GHSA-5r4w-85f3-pw66#Go/github.com/traefik/traefik/v3
• 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

CVE-2026-48491 · published 2026-06-16T19:02:20Z · modified 2026-09-02T15:45:19.838193649Z · JSON