---
cve: "CVE-2026-22045"
severity: "MEDIUM"
cvss: 5.9
epss: "0.3%"
vendor: "traefik"
kev: false
exploited: false
published: "2026-01-15 23:15:51"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:46:22+02:00"
---

# CVE-2026-22045

> 5.9 MEDIUM · 🧪 PoC

## Beschreibung

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the ACME TLS challenge is enabled. A malicious client can open many connections, send a minimal ClientHello with acme-tls/1, then stop responding, leading to denial of service of the entry point. The vulnerability is fixed in 2.11.35 and 3.6.7.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 9e5d4ba5a1cdcf3465630cef858945f90f6b4279 (Commit)
- 17283643416ef8e830565ce40d3d3d7cc453e68e (Commit)

## Referenzen

- <https://github.com/traefik/traefik/security/advisories/GHSA-cwjm-3f7h-9hwq>
- <https://github.com/traefik/traefik/commit/e9f3089e9045812bcf1b410a9d40568917b26c3d>
- <https://github.com/traefik/traefik/releases/tag/v2.11.35>
- <https://github.com/traefik/traefik/releases/tag/v3.6.7>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-22045) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_