Incorrect authorization in Traefik - #VU137268

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Main Vulnerability Database Vulnerabilities #VU137268

Incorrect authorization in Traefik - #VU137268

Published: July 9, 2026


Vulnerability identifier: #VU137268
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Containous
Affected software:
Traefik

Detailed vulnerability description

The vulnerability allows a remote user to cause Traefik to use unauthorized cross-provider backend transport settings.

The vulnerability exists due to improper access control in the Kubernetes CRD provider IngressRouteTCP service serversTransport reference handling when processing cross-provider serversTransport references. A remote user can set a crafted serversTransport reference such as foo@file to cause Traefik to use unauthorized cross-provider backend transport settings.

This can cause Traefik to apply operator-defined backend mTLS client certificates, SPIFFE identity, or PROXY protocol settings from a file-provider TCPServersTransport that the namespace should not be allowed to reference.


Remediation

Install security update from vendor's website.

Sources