CVE-2026-54764
Description
Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's ForwardAuth middleware, even when configured with trustForwardHeader: false, derives the X-Forwarded-Port header sent to the authentication service from the original incoming request instead of the sanitized forwarded request. As a result, an unauthenticated remote attacker can inject an X-Forwarded-Proto: https header over a plain HTTP connection and cause Traefik to forward X-Forwarded-Port: 443 to the authentication service, bypassing port-based authorization checks. This issue is fixed in versions v2.11.51, v3.6.22, and v3.7.6.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/traefik/traefik/v2Go | < 2.11.51 | 2.11.51 |
github.com/traefik/traefik/v3Go | < 3.6.22 | 3.6.22 |
github.com/traefik/traefik/v3Go | >= 3.7.0, < 3.7.6 | 3.7.6 |
github.com/traefik/traefikGo | <= 1.7.34 | — |
Affected products
5- osv-coords2 versionspkg:rpm/opensuse/traefik&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/traefik2&distro=openSUSE%20Tumbleweed
< 3.7.7-1.1+ 1 more
- (no CPE)range: < 3.7.7-1.1
- (no CPE)range: < 2.11.52-1.1
Patches
Vulnerability mechanics
References
8- github.com/traefik/traefik/commit/7ae92d8c2c10ac04ef5a03df0ed5019ce0f44b2dnvdPatchWEB
- github.com/traefik/traefik/security/advisories/GHSA-3q9r-p662-5j8mnvdPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-3q9r-p662-5j8mghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-54764ghsaADVISORY
- github.com/traefik/traefik/pull/13344nvdIssue TrackingWEB
- github.com/traefik/traefik/releases/tag/v2.11.51ghsaWEB
- github.com/traefik/traefik/releases/tag/v3.6.22ghsaWEB
- github.com/traefik/traefik/releases/tag/v3.7.6ghsaWEB
News mentions
0No linked articles in our index yet.