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CVE-2026-65602

CVE-2026-65602 · Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass

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

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references (the allowlist was only enforced for HTTP serversTransport references). A low-privileged Kubernetes user in a namespace not listed in crossProviderNamespaces can set serversTransport: foo@file on an IngressRouteTCP service, causing Traefik to accept the forbidden cross-provider reference and use a file-provider TCPServersTransport — including privileged backend mTLS client certificates, SPIFFE identity, or PROXY-protocol settings. This is fixed in 3.6.23 and 3.7.7.

CVSS 5.3 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: web

Affected products and versions

  • traefik

    Versions
    • ≥ 3.6.0, < 3.6.23: Affected (semver)
    • 3.6.23: Not affected (semver)

    Update to 3.6.23

  • traefik

    Versions
    • ≥ 3.7.0, < 3.7.7: Affected (semver)
    • 3.7.7: Not affected (semver)

    Update to 3.7.7

Original sources

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