CVE-2026-32595
Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
20/03/2026
Last modified:
24/03/2026
Description
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.
Impact
Base Score 4.0
6.30
Severity 4.0
MEDIUM
Base Score 3.x
3.70
Severity 3.x
LOW
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | 2.11.41 (excluding) | |
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | 3.0.0 (including) | 3.6.11 (including) |
| cpe:2.3:a:traefik:traefik:3.7.0:ea1:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page