VULNERABILITY INTELLIGENCE

CVE-2026-85594

CVSS score7 HIGH
EPSS probability0.48%
CISA KEVNot currently listed
Published2026-09-04
Last modified2026-10-08
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Description

Traefik versions from v3.7.1 fail to enforce crossProviderNamespaces restrictions on the traefik.ingress.kubernetes.io/service.middlewares Service annotation in the Kubernetes Ingress provider. A namespace-limited tenant excluded from the allowlist can attach an operator-owned middleware to its Service, and if that middleware injects backend credentials, recover them at a controlled backend.

Weakness classification

  • CWE-639: Authorization Bypass Through User-Controlled Key

Primary references