---
cve: "CVE-2026-65602"
severity: "MEDIUM"
cvss: 5.3
epss: "0.2%"
vendor: "traefik"
kev: false
exploited: false
published: "2026-07-22 12:18:20"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T15:17:54+02:00"
---

# CVE-2026-65602

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references (the allowlist was only enforced for HTTP serversTransport references). A low-privileged Kubernetes user in a namespace not listed in crossProviderNamespaces can set serversTransport: foo@file on an IngressRouteTCP service, causing Traefik to accept the forbidden cross-provider reference and use a file-provider TCPServersTransport — including privileged backend mTLS client certificates, SPIFFE identity, or PROXY-protocol settings. This is fixed in 3.6.23 and 3.7.7.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
```

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

## Patch verfügbar (OSV)

- 84d4e8b139d1ac5e5b2d250fff95baed5ba0584f (Commit)
- b2c18b1e39fbe2099e4dce927e4e6e56674ede0f (Commit)

## Referenzen

- <https://github.com/traefik/traefik/security/advisories/GHSA-42cj-m3vj-89wv>
- <https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0>
- <https://www.vulncheck.com/advisories/traefik-before-ingressroutetcp-serverstransport-namespace-bypass>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-65602) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_