CVE-2026-22045

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/traefik/traefik/commit/e9f3089e9045812bcf1b410a9d40568917b26c3d	Patch
https://github.com/traefik/traefik/releases/tag/v2.11.35	Release Notes
https://github.com/traefik/traefik/releases/tag/v3.6.7	Release Notes
https://github.com/traefik/traefik/security/advisories/GHSA-cwjm-3f7h-9hwq	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:traefik:traefik::::::::
	cpe:2.3:a:traefik:traefik::::::::

History

No history.

Information

Published : 2026-01-15 23:15

Updated : 2026-01-23 19:29

NVD link : CVE-2026-22045

Mitre link : CVE-2026-22045

CVE.ORG link : CVE-2026-22045

JSON object : View

Products Affected

traefik

traefik

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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