CVSS 4.0
7.8 highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:NCVE-2026-35051
High (7.8) in traefik traefik. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/traefik/traefik/v3 3.6.14, 3.7.0-rc.2.
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.
Severity
CVSS 3.1
10.0 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-345, CWE-501
- Published
- Modified
- Record from
- the NVD, synced
Affected
- traefik:traefik
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-6384-m2mw-rf54 | Go | github.com/traefik/traefik/v3 | >=3.7.0-ea.1 <3.7.0-rc.2 | 3.7.0-rc.2 |
| GHSA-6384-m2mw-rf54 | Go | github.com/traefik/traefik/v3 | >=3.0.0-beta1 <3.6.14 | 3.6.14 |
| GHSA-6384-m2mw-rf54 | Go | github.com/traefik/traefik/v2 | <2.11.43 | 2.11.43 |
| GHSA-6384-m2mw-rf54 | Go | github.com/traefik/traefik | <=1.7.34 | no fix published |
| GO-2026-5163 | Go | github.com/traefik/traefik | all versions | no fix published |
| GO-2026-5163 | Go | github.com/traefik/traefik/v2 | <2.11.43 | 2.11.43 |
| GO-2026-5163 | Go | github.com/traefik/traefik/v3 | >=3.0.0-beta1 <3.6.14 >=3.7.0-ea.1 <3.7.0-rc.2 | 3.6.14, 3.7.0-rc.2 |