---
cve: "CVE-2026-25949"
severity: "HIGH"
cvss: 7.5
epss: "71%"
vendor: "traefik"
kev: false
exploited: false
published: "2026-02-12 20:16:11"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T07:06:18+02:00"
---

# CVE-2026-25949

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.8, there is a potential vulnerability in Traefik managing STARTTLS requests. An unauthenticated client can bypass Traefik entrypoint respondingTimeouts.readTimeout by sending the 8-byte Postgres SSLRequest (STARTTLS) prelude and then stalling, causing connections to remain open indefinitely, leading to a denial of service. This vulnerability is fixed in 3.6.8.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| 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)

- 2f215ab9a1068248669dacf77ec6901f21051c75 (Commit)
- 31e566e9f1d7888ccb6fbc18bfed427203c35678 (Commit)

## Referenzen

- <https://github.com/traefik/traefik/security/advisories/GHSA-89p3-4642-cr2w>
- <https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678>
- <https://github.com/traefik/traefik/releases/tag/v3.6.8>
- <https://access.redhat.com/errata/RHSA-2026:6192>
- <https://access.redhat.com/security/cve/CVE-2026-25949>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2439522>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25949.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-25949) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_