Description
Traefik is an open-source edge router that makes publishing services a fun and easy experience. Prior to 2.11.54, 3.6.25, and 3.7.10, cross-namespace @kubernetescrd references are not rejected for TraefikService backend references resolved by the service resolver. A tenant confined by RBAC to a single namespace can therefore bind its own router to a TraefikService owned by another namespace and expose or reroute that namespace's backend, defeating the namespace isolation allowCrossNamespace=false is meant to enforce. This issue is fixed in version 2.11.54, 3.6.25, 3.7.10.
Severity (CVSS)
| Base score | 4.8 |
|---|---|
| Severity | Medium |
| Version | CVSS 4.0 |
| Vector | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N |
| Provided by | CNA |
Weaknesses
- CWE-653 — CWE-653: Improper Isolation or Compartmentalization
- CWE-863 — CWE-863: Incorrect Authorization
Affected products
| Vendor | Product | Versions |
|---|---|---|
| traefik | traefik | < 2.11.54; >= 3.0.0, < 3.6.25; >= 3.7.0, < 3.7.10 |
References
- https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq (x_refsource_CONFIRM)
- https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d52d (x_refsource_MISC)
- https://github.com/traefik/traefik/releases/tag/v2.11.54 (x_refsource_MISC)
- https://github.com/traefik/traefik/releases/tag/v3.6.25 (x_refsource_MISC)
- https://github.com/traefik/traefik/releases/tag/v3.7.10 (x_refsource_MISC)
Generated from the official CVE List on 07 Aug 2026 07:02 UTC.