{"id":"GHSA-6mxq-jr92-3h2r","revision":"b86c2a1568e04793aec3b0d1ef5e7ead","records":[{"revision":"b86c2a1568e04793aec3b0d1ef5e7ead","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-6mxq-jr92-3h2r","aliases":[],"title":"Duplicate Advisory: Traefik Gateway API HTTPRoute BackendRef ExtensionRef Namespace Confusion","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of\u00A0GHSA-qq9q-x9w4-chhj. This link is maintained to preserve external references.\n\n## Original Description\nTraefik 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.","state":2,"publishedAt":"2026-07-22T12:32:18+00:00","modifiedAt":"2026-08-05T22:01:01.3045458+00:00","affected":[{"ecosystem":"Go","name":"github.com/traefik/traefik","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"3.7.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/traefik/traefik/security/advisories/GHSA-qq9q-x9w4-chhj","https://nvd.nist.gov/vuln/detail/CVE-2026-65601","https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0","https://www.vulncheck.com/advisories/traefik-before-namespace-confusion-via-httproute-extensionref"],"sourceUrl":"https://github.com/advisories/GHSA-6mxq-jr92-3h2r","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-6mxq-jr92-3h2r","identifiers":["GHSA-6mxq-jr92-3h2r"]},"retained":false,"historicalAffected":[]}],"coverage":[]}