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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-65602

Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

traefik traefik

Default version status: unaffected

  • 3.6.0 to < 3.6.23affected
  • 3.6.23unaffected
pkg:golang/github.com/traefik/traefik/v3

traefik traefik

Default version status: unaffected

  • 3.7.0 to < 3.7.7affected
  • 3.7.7unaffected
pkg:golang/github.com/traefik/traefik/v3

References