Vulnerability 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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Traefik | Traefik | < 2.11.41 |
Related Weaknesses (CWE)
References
- https://github.com/traefik/traefik/releases/tag/v2.11.41Release Notes
- https://github.com/traefik/traefik/releases/tag/v3.6.11Release Notes
- https://github.com/traefik/traefik/releases/tag/v3.7.0-ea.2Release Notes
- https://github.com/traefik/traefik/security/advisories/GHSA-g3hg-j4jv-cwfrPatchVendor Advisory
FAQ
What is CVE-2026-32595?
CVE-2026-32595 is a vulnerability with a CVSS score of 3.7 (LOW). 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 at...
How severe is CVE-2026-32595?
CVE-2026-32595 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32595?
Check the references section above for vendor advisories and patch information. Affected products include: Traefik Traefik.