HIGHVulnerability
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NVD HIGH: CVE-2026-114640 — Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerabili...

·Source: NIST NVD

Updated:

Executive Summary

Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerability in its Kubernetes Ingress-NGINX provider that forwards client-supplied Ssl-Client-* headers on the plaintext HTTP router. When ssl-redirect is disabled alongside auth-tls-pass-certificate-to-upstream, unauthenticated attackers can send Ssl-Client-Verify: SUCCESS with a chosen certificate subject and issuer to impers

Analysis

Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerability in its Kubernetes Ingress-NGINX provider that forwards client-supplied Ssl-Client-* headers on the plaintext HTTP router. When ssl-redirect is disabled alongside auth-tls-pass-certificate-to-upstream, unauthenticated attackers can send Ssl-Client-Verify: SUCCESS with a chosen certificate subject and issuer to impersonate mTLS identities. CVSS Score: 8.7. Published: 2026-10-22T02:16:56.947.

Indicators of Compromise (1)

CVE (1)
CVE-2026-114640
Source Attribution

Originally published by NIST NVD on Oct 22, 2026. Verified by: NIST.

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