CVE-2026-35051

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 v3 10.0 CRITICAL

10.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/traefik/traefik/releases/tag/v2.11.43	Product Release Notes
https://github.com/traefik/traefik/releases/tag/v3.6.14	Product Release Notes
https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2	Product Release Notes
https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54	Exploit Patch Vendor Advisory
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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:traefik:traefik::::::::
	cpe:2.3:a:traefik:traefik::::::::
	cpe:2.3:a:traefik:traefik:3.7.0:ea1::::::
	cpe:2.3:a:traefik:traefik:3.7.0:ea2::::::
	cpe:2.3:a:traefik:traefik:3.7.0:ea3::::::
	cpe:2.3:a:traefik:traefik:3.7.0:rc1::::::

History

No history.

Information

Published : 2026-04-30 21:16

Updated : 2026-07-15 02:20

NVD link : CVE-2026-35051

Mitre link : CVE-2026-35051

CVE.ORG link : CVE-2026-35051

JSON object : View

Products Affected

traefik

traefik

CWE

CWE-345

Insufficient Verification of Data Authenticity

CWE-501

Trust Boundary Violation

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