CVE-2026-22045

Name: CVE-2026-22045
Creator: NVD / NIST
Published: 2026-01-15T23:15:51.593+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2026-22045 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the ACME TLS challenge is enabled. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the ACME TLS challenge is enabled. A malicious client can open many connections, send a minimal ClientHello with acme-tls/1, then stop responding, leading to denial of service of the entry point. The vulnerability is fixed in 2.11.35 and 3.6.7.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.32%

23.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Traefik	Traefik	< 2.11.35
Traefik	Traefik	>= 3.0.0, < 3.6.7

References

https://github.com/traefik/traefik/commit/e9f3089e9045812bcf1b410a9d40568917b26c3dPatch
https://github.com/traefik/traefik/releases/tag/v2.11.35Release Notes
https://github.com/traefik/traefik/releases/tag/v3.6.7Release Notes
https://github.com/traefik/traefik/security/advisories/GHSA-cwjm-3f7h-9hwqPatch, Vendor Advisory

Timeline

Published: Jan 15, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-22045?

How severe is CVE-2026-22045?

CVE-2026-22045 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2026-22045?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-22045?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST