CVE-2026-35051
criticalTraefik is an HTTP reverse proxy and load balancer.
Vendor / product: Traefik — traefik
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.
CVSS
10.0
10.0 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-04-30 21:16
Modified: 2026-11-11 21:10
NVD status: Modified
Last synced 1 day ago
Verified against the source API 2026-11-11 21:11 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
traefik / traefik <2.11.43, ≥3.0.0 <3.6.14, 3.7.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54
References
- https://github.com/traefik/traefik/releases/tag/v2.11.43 security-advisories@github.com
- https://github.com/traefik/traefik/releases/tag/v3.6.14 security-advisories@github.com
- https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2 security-advisories@github.com
- https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54 security-advisories@github.com
- https://access.redhat.com/errata/RHSA-2026:21772 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://access.redhat.com/security/cve/CVE-2026-35051 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://bugzilla.redhat.com/show_bug.cgi?id=2464235 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35051.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Data sources
NVD CVE API 2.0 — fetched 2026-11-11 21:11 UTC · record ↗