CVE-2026-119573

Medium

Description

Traefik 3.7.11 before 3.7.15 contains an authorization bypass in the Kubernetes Ingress NGINX provider that skips the cross-namespace check on the auth-tls-secret annotation when a cached client authentication TLS option is reused. Users who can create Ingresses can reference another namespace's CA secret already used by another Ingress, enforcing it on their own routes and learning whether it exists, without disclosure of its contents.

SeverityMedium

CVSS4.4

Exploit probability—

Product

Traefik

PublishedOct 30, 2026

First seenNov 4, 2026

Weakness typeCWE-863Incorrect authorization

How to fix

Update

traefik traefik3.7.15 or later

Vendor advisories

github.com/traefik/traefik/security/advisories/GHSA-28hp-c82p-8vqj

Affected products

Product	Affected versions	Fixed in
traefik traefik	3.7.11 ≤ v < 3.7.15	3.7.15

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