CVE-2026-32595
Low · 3.7CVSS
3.7
EPSS
0.4%
Published
Mar 20, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Leap 15.6 | govulncheck-vulndb | 0 | 0.0.20260326T203309-150000.1.155.2 |
| openSUSE:Tumbleweed | traefik | 0 | 3.6.12-1.1 |
| openSUSE:Tumbleweed | traefik2 | 0 | 2.11.42-1.1 |
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