---
cve: "CVE-2026-32595"
severity: "MEDIUM"
cvss: 6.3
epss: "39%"
vendor: "traefik"
kev: false
exploited: false
published: "2026-03-20 11:18:02"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T20:46:29+02:00"
---

# CVE-2026-32595

> 6.3 MEDIUM · 🧪 PoC

## Beschreibung

Traefik is an HTTP reverse proxy and load balancer. Versions 2.11.40 and below, 3.0.0-beta1 through 3.6.11, and 3.7.0-ea.1 comtain BasicAuth middleware that allows username enumeration via a timing attack. When a submitted username exists, the middleware performs a bcrypt password comparison taking ~166ms. When the username does not exist, the response returns immediately in ~0.6ms. This ~298x timing difference is observable over the network and allows an unauthenticated attacker to reliably distinguish valid from invalid usernames. This issue is patched in versions 2.11.41, 3.6.11 and 3.7.0-ea.2.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- f2c198c9f36e97895f045e83ad2050ad21e52f86 (Commit)
- 33219a0af86c41a8db81d37c444f65172bfb3e35 (Commit)

## Referenzen

- <https://github.com/traefik/traefik/security/advisories/GHSA-g3hg-j4jv-cwfr>
- <https://github.com/traefik/traefik/releases/tag/v2.11.41>
- <https://github.com/traefik/traefik/releases/tag/v3.6.11>
- <https://github.com/traefik/traefik/releases/tag/v3.7.0-ea.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-32595) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_