{"schemaVersion":3,"id":"GHSA-7M3P-WC52-RMC6","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Duplicate Advisory: Traefik CRD IngressRouteTCP ServersTransport Cross-Provider Namespace Bypass\n\n## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-42cj-m3vj-89wv.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.","dates":{"published":"2026-07-22T12:32:18.000Z","modified":"2026-08-05T22:01:01.315Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"4.0","versionLabel":"v4.0","source":"OSV · Go","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","computed":true,"selection":"version-preference"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"OSV · Go","score":5.3,"severity":"medium","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","exploitability":null,"impact":null,"computed":true}]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"github.com/traefik","product":"traefik","name":"github.com/traefik/traefik","label":"traefik","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/traefik/traefik","purlType":"golang","versions":[{"text":"≥ 3.6.0, ≤ 3.6.22","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 3.6.0, ≤ 3.6.22","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-42cj-m3vj-89wv","label":"github.com/traefik/traefik/security/advisories/GHSA-42cj-m3vj-89wv","hostname":"github.com","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65602","label":"nvd.nist.gov/vuln/detail/CVE-2026-65602","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0","label":"github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0","hostname":"github.com","tags":["WEB"]},{"url":"https://www.vulncheck.com/advisories/traefik-before-ingressroutetcp-serverstransport-namespace-bypass","label":"www.vulncheck.com/advisories/traefik-before-ingressroutetcp-serverstransport-namespace-bypass","hostname":"www.vulncheck.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-07-22T12:32:18.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-05T22:01:01.315Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":21,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T20:53:48.471Z","stale":false,"partial":false}}