Authentication Bypass in Traefik Ingress NGINX Provider
CVE-2026-54762

5.9MEDIUM

Key Information:

Vendor

Traefik

Status
Traefik
Vendor
CVE Published:
23 June 2026

What is CVE-2026-54762?

A vulnerability in Traefik's Kubernetes Ingress NGINX provider affects versions from 3.7.0-ea.1 to 3.7.5. It allows unauthorized access to backend services by failing to enforce authentication controls when the referenced auth Secret cannot be resolved or parsed. This occurs specifically when BasicAuth or DigestAuth is enabled. As a result, if the required authentication Secret is missing, malformed, unreadable, or access is denied due to policy, affected routes are inadvertently exposed, permitting unauthenticated requests. This flaw was addressed in version 3.7.5.

Affected Version(s)

traefik >= 3.7.0-ea.1, < 3.7.5

References

https://github.com/traefik/traefik/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/traefik/traefik/releases/tag/v3.7.5
x_refsource_MISC

CVSS V4

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.