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CVE PROGRAM SOURCE RECORD7.0 High

CVE-2026-114640

Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX HTTP Router

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerability in its Kubernetes Ingress-NGINX provider that forwards client-supplied Ssl-Client-* headers on the plaintext HTTP router. When ssl-redirect is disabled alongside auth-tls-pass-certificate-to-upstream, unauthenticated attackers can send Ssl-Client-Verify: SUCCESS with a chosen certificate subject and issuer to impersonate mTLS identities.

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

  • 3.7.0 to < 3.7.14affected
  • 3.7.14unaffected
pkg:golang/github.com/traefik/traefik/v3

References