CVE-2026-32595 (GCVE-0-2026-32595)
Vulnerability from cvelistv5
Published
2026-03-20 10:08
Modified
2026-03-20 15:38
Severity ?
6.3 (Medium) - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
CWE
  • CWE-208 - Observable Timing Discrepancy
Summary
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.
References
Impacted products
Vendor Product Version
traefik traefik Version: < 2.11.41
Version: >= 3.0.0-beta1, < 3.6.11
Version: >= 3.7.0-ea.1, < 3.7.0-ea.2
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