Description
Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is a timing side-channel vulnerability in Traefik's BasicAuth middleware that allows an attacker to enumerate valid usernames through response-time differences. The variable intended to hold a constant-time fallback secret always resolves to an empty string, causing the constant-time comparison to short-circuit in microseconds rather than performing a full bcrypt evaluation. This restores the original timing oracle and makes it possible to distinguish existing users from non-existing ones by measuring authentication response times. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.
INFO
Published Date :
2026-04-30T20:39:49.658Z
Last Modified :
2026-05-01T14:22:40.566Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-41263 vulnerability.
| Vendors | Products |
|---|---|
| Traefik |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-41263.
