---
id: CVE-2026-114638
title: >-
  Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name
  Collision
summary: >-
  Traefik v3.7.0 before v3.7.14 contains an improper authentication
  vulnerability in the Kubernetes Ingress NGINX provider that merges client CAs
  when auth-tls-secret names collide after dot-to-dash normalization. Attackers
  holding certifi…
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-287
vendor: traefik
product: traefik
affected:
  - traefik >= 3.7.0 < 3.7.14
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T01:43:38.571Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114638'
references:
  - url: 'https://github.com/traefik/traefik/security/advisories/GHSA-rv2h-qh7j-xrjw'
    label: GitHub Security Advisory (GHSA-rv2h-qh7j-xrjw)
  - url: >-
      https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-client-ca-mix-up-via-auth-tls-secret-name-collision
    label: >-
      VulnCheck Advisory: Traefik v3.7.0 before v3.7.14 Client CA Mix-up via
      auth-tls-secret Name Collision
tags:
  - cve.org
ingestedAt: '2026-10-22T02:23:25.184Z'
---

## Overview

Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability in the Kubernetes Ingress NGINX provider that merges client CAs when auth-tls-secret names collide after dot-to-dash normalization. Attackers holding certificates from another host's CA can access a host requiring its own client CA, while that host's legitimate clients are refused.

## Affected

- `traefik >= 3.7.0 < 3.7.14`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.