Disclosure summary
Traefik 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.
Source-reported weakness categories
CWE-863
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-65602
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| traefik | traefik | * {"versionStartIncluding":"3.7.0","versionEndExcluding":"3.7.7"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch
- github.com — Vendor Advisory
- www.vulncheck.com — Third Party Advisory
PUBLISHED 2026-07-22T08:18:20-04:00
MODIFIED 2026-10-08T12:17:29-04:00
INGESTED 2026-10-10T20:50:36-04:00