Information Exposure Through Timing Discrepancy in Traefik - CVE-2026-32595

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Main Vulnerability Database Vulnerabilities #VU129670

Information Exposure Through Timing Discrepancy in Traefik - CVE-2026-32595

Published: May 5, 2026


Vulnerability identifier: #VU129670
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-32595
CWE-ID: CWE-208
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Containous
Affected software:
Traefik

Detailed vulnerability description

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.


How to mitigate CVE-2026-32595

Install security update from vendor's website.

Sources