CVE-2026-71325Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.8 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-653, CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
traefik traefik traefik:traefik (from the name) | before 2.11.54; from 3.0.0, < 3.6.25; from 3.7.0, < 3.7.10 | CNA record |
traefik traefik traefik:traefik | before 2.11.54; from 3.0.0 before 3.6.25; from 3.7.0 through 3.7.10 | NVD |
References
- https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmqx-refsource-confirm, patch, vendor-advisory
- https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d52dx-refsource-misc, patch
- https://github.com/traefik/traefik/releases/tag/v2.11.54x-refsource-misc, release-notes
- https://github.com/traefik/traefik/releases/tag/v3.6.25x-refsource-misc, release-notes
- https://github.com/traefik/traefik/releases/tag/v3.7.10x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.