Incorrect Authorization Affecting github.com/traefik/traefik/v3/pkg/provider/kubernetes/crd package, versions >=3.0.0-beta1 <3.6.14>=3.7.0-ea.1 <3.7.0-rc.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMTRAEFIKTRAEFIKV3PKGPROVIDERKUBERNETESCRD-16316389
- published28 Apr 2026
- disclosed24 Apr 2026
- creditTameem Qudah
Introduced: 24 Apr 2026
CVE-2026-41174 Â (opens in a new tab)How to fix?
Upgrade github.com/traefik/traefik/v3/pkg/provider/kubernetes/crd to version 3.6.14, 3.7.0-rc.2 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Authorization in the createChainMiddleware() function. Even when providers.kubernetesCRD.allowCrossNamespace=false is set, references in spec.chain.middlewares[] may be followed to access objects in other namespaces. A user with permission to create or update Traefik CRDs in their own namespace can cause unauthorized middleware from another namespace to be applied.