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CVE-2026-114656

CVE-2026-114656 · Traefik before 2.11.58 and 3.7.13 mTLS Bypass via Negated Host Matcher

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Traefik before 2.11.58 and 3.7.13 contains an authentication bypass vulnerability that allows unauthenticated clients to skip client-certificate checks because negated Host matchers are counted as served domains. Attackers can reach backends protected by RequireAndVerifyClientCert when a router rule with !Host() creates a TLS options conflict that falls back to the default options.

CVSS 6.9 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: web

Affected products and versions

  • traefik

    Versions
    • ≥ 0, < 2.11.58: Affected (semver)
    • 2.11.58: Not affected (semver)

    Update to 2.11.58

  • traefik

    Versions
    • ≥ 3.0.0, < 3.7.13: Affected (semver)
    • 3.7.13: Not affected (semver)

    Update to 3.7.13

Original sources

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