# CVE-2026-35051

> Vulnerability · severity: **CRITICAL** (CVSS 10).

## Description

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.

## Key facts

- **CVE ID:** CVE-2026-35051
- **Published:** 2026-04-30
- **CVSS severity:** CRITICAL
- **CVSS base score:** 10
- **CWE codes:** CWE-345

## Affected products

- `traefik:traefik`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-35051

## Citation

> AI Analytics. CVE-2026-35051. Retrieved 2026-09-03 from https://api.ai-analytics.org/cve/CVE-2026-35051. Derived from NIST NVD. Licensed CC0.

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