CVE-2026-65601 (GCVE-0-2026-65601)
Vulnerability from cvelistv5
Published
2026-07-22 11:21
Modified
2026-07-24 21:35
Severity ?
5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
CWE
  • CWE-863 - Incorrect Authorization
Summary
Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules[].backendRefs[].filters[].extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route author holding a ReferenceGrant for a cross-namespace Service could therefore bind a Traefik Middleware from the backend namespace without a separate grant for that middleware, potentially injecting trusted reverse-proxy identity headers into downstream requests. The issue is fixed in version 3.7.7.
References
Impacted products
Vendor Product Version
traefik traefik Version: 3.7.0   ≤
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