CVE-2022-39271: Traefik

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer that assists in deploying microservices. There is a potential vulnerability in Traefik managing HTTP/2 connections. A closing HTTP/2 server connection could hang forever because of a subsequent fatal error. This failure mode could be exploited to cause a denial of service. There has been a patch released in versions 2.8.8 and 2.9.0-rc5. There are currently no known workarounds.

Affected products

• Traefik Traefik: before 2.8.8 (fixed in 2.8.8); version 2.9.0 only

Published 2022-10-11. Last modified 2026-06-17.