---
cve: "CVE-2026-71325"
severity: "MEDIUM"
cvss: 4.8
epss: "13%"
vendor: "traefik"
kev: false
exploited: false
published: "2026-08-06 22:18:29"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T08:43:50+02:00"
---

# CVE-2026-71325

> 4.8 MEDIUM · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 1e8e8c200cce5fbd1fff8579e5e9dc0311a8a54a (Commit)
- 4b18b24b0b002dcc80e0640c6088a87d813de29a (Commit)

## Referenzen

- <https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq>
- <https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d52d>
- <https://github.com/traefik/traefik/releases/tag/v2.11.54>
- <https://github.com/traefik/traefik/releases/tag/v3.6.25>
- <https://github.com/traefik/traefik/releases/tag/v3.7.10>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-71325) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_