Traefik 3.7.11 before 3.7.15 Cross-Namespace Authorization Bypass via auth-tls-secret

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.

Scores

EPSS (exploitation in 30 days)

0.26% · top 82% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.1.

Weakness

• CWE-863: Incorrect Authorization (opens in a new tab)All about CWE-863 and its CVEs

Affected products

• traefik · traefik

  • affected 3.7.11 – < 3.7.15
  • unaffected 3.7.15

References (2)

• GitHub Security Advisory (GHSA-28hp-c82p-8vqj) (opens in a new tab)vendor-advisory
• VulnCheck Advisory: Traefik 3.7.11 before 3.7.15 Cross-Namespace Authorization Bypass via auth-tls-secret (opens in a new tab)third-party-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-119573](https://trackcve.app/badge/CVE-2026-119573.svg)](https://trackcve.app/cve/CVE-2026-119573)

Record last updated 30 Oct 2026, 15:53 UTC.