{"id":"GHSA-7m3p-wc52-rmc6","summary":"Duplicate Advisory: Traefik CRD IngressRouteTCP ServersTransport Cross-Provider Namespace Bypass","details":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-42cj-m3vj-89wv. This link is maintained to preserve external references.\n\n## Original Description\nTraefik 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 This is fixed in 3.6.23 and 3.7.7.","modified":"2026-08-05T22:01:01.315858157Z","published":"2026-07-22T12:32:18Z","withdrawn":"2026-08-05T21:51:05Z","database_specific":{"cwe_ids":["CWE-863"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-08-05T21:51:05Z","nvd_published_at":"2026-07-22T12:18:20Z"},"references":[{"type":"WEB","url":"https://github.com/traefik/traefik/security/advisories/GHSA-42cj-m3vj-89wv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65602"},{"type":"WEB","url":"https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/traefik-before-ingressroutetcp-serverstransport-namespace-bypass"}],"affected":[{"package":{"name":"github.com/traefik/traefik","ecosystem":"Go","purl":"pkg:golang/github.com/traefik/traefik"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.6.0"},{"last_affected":"3.6.22"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-7m3p-wc52-rmc6/GHSA-7m3p-wc52-rmc6.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}