---
title: "CVE-2026-114639: Traefik - Authentication Bypass"
description: "Traefik 2.11.0 < 2.11.58 and 3.0.0 < 3.7.14 contain an authentication bypass caused by shared backend connection pool socket reuse with preauthenticated Authorization: Negotiate tokens, letting unauthenticated attackers perform actions as victim, exploit requires unauthenticated attacker on separate frontend connections."
url: https://panop.io/threat-heartbeat/CVE-2026-114639/
---

# CVE-2026-114639 Traefik - Authentication Bypass

Traefik 2.11.0 < 2.11.58 and 3.0.0 < 3.7.14 contain an authentication bypass caused by shared backend connection pool socket reuse with preauthenticated Authorization: Negotiate tokens, letting unauthenticated attackers perform actions as victim, exploit requires unauthenticated attacker on separate frontend connections.

CVSS base score 8.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.31% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-114639)

## Details

Type

Authentication Bypass

Impact

Broken Authentication, Data Tampering, Information Disclosure

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 versions 2.11.58, 3.7.14 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-2026-114639](https://nvd.nist.gov/vuln/detail/CVE-2026-114639)
- [https://github.com/traefik/traefik/security/advisories/GHSA-qm9f-w54v-q2qh](https://github.com/traefik/traefik/security/advisories/GHSA-qm9f-w54v-q2qh)
- [https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-authentication-bypass-via-negotiate-connection-pool](https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-authentication-bypass-via-negotiate-connection-pool)

[← All CVEs](https://panop.io/threat-heartbeat/)

## 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

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)