Information Exposure Through Timing Discrepancy in Traefik - CVE-2026-32595
Published: May 5, 2026
Vulnerability identifier: #VU129670
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-32595
CWE-ID: CWE-208
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to enumerate valid usernames.
The vulnerability exists due to observable timing discrepancy in the BasicAuth middleware when validating submitted credentials. A remote attacker can send authentication requests and measure response times to enumerate valid usernames.
Only deployments with the BasicAuth middleware enabled are vulnerable.
Affected software
Traefik
How to mitigate CVE-2026-32595
Install security update from vendor's website.
Traefik - addressed in versions 2.11.41, 3.6.11