---
title: "CVE-2026-114638: Traefik - Authentication Bypass"
description: "Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability caused by client CA merging in Kubernetes Ingress NGINX provider due to auth-tls-secret name collisions, letting attackers with certificates from another host's CA bypass authentication, exploit requires attacker to hold a certificate from another host's CA."
url: https://panop.io/threat-heartbeat/CVE-2026-114638/
---

# CVE-2026-114638 Traefik - Authentication Bypass

Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability caused by client CA merging in Kubernetes Ingress NGINX provider due to auth-tls-secret name collisions, letting attackers with certificates from another host's CA bypass authentication, exploit requires attacker to hold a certificate from another host's CA.

CVSS base score 8.7 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.19% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-114638)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Published

22 October 2026

Updated

23 October 2026

Weakness

[CWE-287](https://cwe.mitre.org/data/definitions/287.html)

## Vendor fix

Upgrade to version v3.7.14 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-114638](https://nvd.nist.gov/vuln/detail/CVE-2026-114638)
- [https://github.com/traefik/traefik/security/advisories/GHSA-rv2h-qh7j-xrjw](https://github.com/traefik/traefik/security/advisories/GHSA-rv2h-qh7j-xrjw)
- [https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-client-ca-mix-up-via-auth-tls-secret-name-collision](https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-client-ca-mix-up-via-auth-tls-secret-name-collision)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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