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CVE-2026-54762

Traefik vulnerability

8.6 HIGHPublic exploitEPSS 0.43%
  1. Published23 Jun 2026

Description

Traefik is an HTTP reverse proxy and load balancer. From 3.7.0-ea.1 until 3.7.5, there is a medium severity vulnerability in Traefik's Kubernetes Ingress NGINX provider that causes affected routes to fail open. When an Ingress explicitly enables BasicAuth or DigestAuth through the supported nginx.ingress.kubernetes.io/auth-type and auth-secret annotations, but the referenced auth Secret cannot be resolved or parsed, Traefik logs the resolution error, skips installing the authentication middleware, and still emits a router to the backend service. A route that operators intended to protect is therefore published to the data plane without its authentication control, allowing unauthenticated access to the backend. The trigger is an invalid or unresolved auth dependency — a missing, malformed, unreadable, or policy-denied Secret — rather than an intentionally unprotected route. This vulnerability is fixed in 3.7.5.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected products

Traefik≥ 3.7.0 < 3.7.5

Remediation

Fixed in
Traefik≥ 3.7.5

References

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Frequently asked

Is CVE-2026-54762 being actively exploited?

CVE-2026-54762 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.43%.

How severe is CVE-2026-54762?

CVE-2026-54762 has a CVSS 3.1 base score of 8.6, rated high. EPSS estimates a 0.43% probability of exploitation.

Which products are affected by CVE-2026-54762?

Affected products include Traefik.

How do I fix CVE-2026-54762?

Upgrade affected software to a fixed version, for example Traefik 3.7.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.