CVE-2026-35051GHSA-6384-M2MW-RF54GO-2026-5163
Traefik: ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass auth
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.11.43, 3.6.14, 3.7.0-rc.2
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: yes
- Technical impact: total
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: total
- Record last updated
Affected versions
- traefik traefik
fixed in 2.11.43; From 3.0.0-beta1 · fixed in 3.6.14; From 3.7.0-ea.1 · fixed in 3.7.0-rc.2
- github.com/traefik/traefik/v3Go
From 3.7.0-ea.1 · fixed in 3.7.0-rc.2
- github.com/traefik/traefik/v3Go
From 3.0.0-beta1 · fixed in 3.6.14
- github.com/traefik/traefik/v2Go
fixed in 2.11.43
- github.com/traefik/traefikGo
through 1.7.34
- github.com/traefik/traefikGo
All versions
- github.com/traefik/traefik/v3Go
From 3.0.0-beta1 · fixed in 3.6.14; From 3.7.0-ea.1 · fixed in 3.7.0-rc.2