CVE-2026-713254.8MediumCWE-653

CVE-2026-71325: Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef

traefik

Affected: traefik · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.2%probability of exploitation in the next 30 days

4th percentile

050100

Higher than 4% of scored CVEs

4.8MediumCVSS 4.0

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

traefik · traefik< 2.11.54; >= 3.0.0, < 3.6.25; >= 3.7.0, < 3.7.10

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Improper Isolation or Compartmentalization · Access Control
Vendor: traefik
Published: August 2026
Band: Unlikely (under 1%), August 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-71325 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.