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CVE-2026-114642

CVE-2026-114642 · Traefik before 2.11.58 and 3.7.14 TLS Config Bypass via NTLM/Kerberos Round Tripper

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

Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 stores its NTLM/Kerberos backend round tripper in a client-connection slot not keyed by ServersTransport, so one service's TLS client configuration is reused for another service's backend. An unauthenticated client can arm the slot via a backend issuing an NTLM or Negotiate challenge, then reach another service on the same keep-alive connection, bypassing its root CAs, server name, and certificate verification.

CVSS 7.0 · High · EPSS 0.2% · Fix available

Published
Updated

Stack: web

Affected products and versions

  • traefik

    Versions
    • ≥ 2.11.0, < 2.11.58: Affected (semver)
    • 2.11.58: Not affected (semver)

    Update to 2.11.58

  • traefik

    Versions
    • ≥ 3.0.0, < 3.7.14: Affected (semver)
    • 3.7.14: Not affected (semver)

    Update to 3.7.14

Original sources

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