CVE-2026-32595: Traefik

Low severity, CVSS 3.7. EPSS: 0.4% chance of exploitation in the next 30 days.

Traefik is an HTTP reverse proxy and load balancer. Versions 2.11.40 and below, 3.0.0-beta1 through 3.6.11, and 3.7.0-ea.1 comtain BasicAuth middleware that allows username enumeration via a timing attack. When a submitted username exists, the middleware performs a bcrypt password comparison taking ~166ms. When the username does not exist, the response returns immediately in ~0.6ms. This ~298x timing difference is observable over the network and allows an unauthenticated attacker to reliably distinguish valid from invalid usernames. This issue is patched in versions 2.11.41, 3.6.11 and 3.7.0-ea.2.

Affected products

• Traefik Traefik: before 2.11.41 (fixed in 2.11.41); from 3.0.0, up to and including 3.6.11; version 3.7.0 only

Published 2026-03-20. Last modified 2026-06-17.