CVE-2024-39321: Traefik

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Traefik is an HTTP reverse proxy and load balancer. Versions prior to 2.11.6, 3.0.4, and 3.1.0-rc3 have a vulnerability that allows bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes sent with spoofed IP addresses. Versions 2.11.6, 3.0.4, and 3.1.0-rc3 contain a patch for this issue. No known workarounds are available.

Affected products

• Traefik Traefik: before 2.11.6 (fixed in 2.11.6); from 3.0.0, before 3.0.4 (fixed in 3.0.4); version 3.1.0 only

Published 2024-07-05. Last modified 2026-06-17.