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Vulnerability record · CVE-2026-71325 · published 6 August 2026

CVE-2026-71325: Traefik incorrect authorization vulnerability

Traefik · Traefik

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.

4.8 CVSS 4.0 Medium EPSS 0.16% · top 96.0% CWE-653 · CWE-653CWE-863 · Incorrect authorization
4.8CVSS 4.0 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
16 Sep 2026Last modified by NVD

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.

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/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d52d Patch
https://github.com/traefik/traefik/releases/tag/v2.11.54 Release Notes
https://github.com/traefik/traefik/releases/tag/v3.6.25 Release Notes
https://github.com/traefik/traefik/releases/tag/v3.7.10 Release Notes
https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq PatchVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-71325), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.