Summary
generated automatically from NVD dataTraefik, an HTTP reverse proxy and load balancer, has an authentication bypass in its ForwardAuth middleware. The flaw appears when trustForwardHeader=false is configured and Traefik runs behind a trusted upstream proxy, and it is associated with CWE-345. It is rated CRITICAL with a CVSS v3.1 score of 10.0, and the NVD description states it has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.
NVD 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.
EPSS · FIRST.org
0.31%probability of exploitation in the next 30 days
Higher than 22% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-16, recomputed daily by FIRST.org.
In-depth analysis on cveo.tech
We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.
CVSS v3.1 Score
Information
- Published
- 30 avr. 2026
- Updated
- 15 juil. 2026
- Status
- Modified
- Source
- security-advisories@github.com
Affected products
Weaknesses (CWE)
References (8)
- https://github.com/traefik/traefik/releases/tag/v2.11.43ProductRelease Notes
- https://github.com/traefik/traefik/releases/tag/v3.6.14ProductRelease Notes
- https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2ProductRelease Notes
- https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54ExploitPatchVendor Advisory
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