CVE catalog
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 trustFor
- Severity
- Critical · CVSS 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.27% · Oct 25, 2026
A flaw was found in Traefik, an HTTP reverse proxy and load balancer. This authentication bypass vulnerability exists in Traefik's ForwardAuth middleware when the `trustForwardHeader` setting is configured as `false` and Traefik is deployed behind a trusted upstream proxy. A remote attacker could exploit this to bypass authentication, potentially gaining unauthorized access to protected resources. Traefik: github.com/traefik/traefik: Traefik: Authentication bypass in ForwardAuth middleware The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | traefik | Not reported | 2.11.43 | fixed |
| Cpe | traefik | Not reported | 3.6.14 | fixed |
| Cpe | traefik | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | traefik | cpe | Not reported | 2.11.43 | Not reported | Not reported | Not reported |
| Cpe | traefik | cpe | Not reported | 3.6.14 | Not reported | Not reported | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10697-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-35051]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35051.json]
[FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]