High 7.8Published Apr 30, 2026

CVE-2026-35051Traefik: ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass auth

Updated under an hour ago (Oct 28, 2026, 9:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for traefik

Exploited in the last 30 days

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: 7.8 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
Weakness (CWE): CWE-345, CWE-501
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

traefik traefik traefik:traefik (from the name)	before 2.11.43; from 3.0.0-beta1, < 3.6.14; from 3.7.0-ea.1, < 3.7.0-rc.2	CNA record
Red Hat Red Hat OpenShift Dev Spaces 3.28 redhat:openshift_devspaces	from 1779786779 not affected	CISA ADP
traefik traefik traefik:traefik	before 2.11.43; from 3.0.0 before 3.6.14; 3.7.0; 3.7.0; 3.7.0; 3.7.0	NVD

References

References

https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54	x-refsource-confirm, exploit, patch, vendor-advisory
https://github.com/traefik/traefik/releases/tag/v2.11.43	x-refsource-misc, product, release-notes
https://github.com/traefik/traefik/releases/tag/v3.6.14	x-refsource-misc, product, release-notes
https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2	x-refsource-misc, product, release-notes
https://access.redhat.com/errata/RHSA-2026:21772
https://access.redhat.com/security/cve/CVE-2026-35051
https://bugzilla.redhat.com/show_bug.cgi?id=2464235
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35051.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.