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CVE-2026-119573 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:3 LOWVector:CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:N

CNA: [email protected]CVSS-B:4.4 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/traefik/traefik/security/advisories/GHSA-28hp-c82p-8vqj	[email protected]	PatchVendor Advisory
https://www.vulncheck.com/advisories/traefik-3.7.11-before-3.7.15-cross-namespace-authorization-bypass-via-auth-tls-secret	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-863	Incorrect Authorization	[email protected]

Affected Products

Product	Versions
traefik traefik	>= 3.7.11, < 3.7.15
CPE cpe:2.3:a:traefik:traefik:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Nov 3, 2026	Initial Analysis	[email protected]
Oct 30, 2026	CVE Modified	CISA-ADP
Oct 30, 2026	New CVE Received	[email protected]