CVE-2018-1999043: Jenkins

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

A denial of service vulnerability exists in Jenkins 2.137 and earlier, 2.121.2 and earlier in BasicAuthenticationFilter.java, BasicHeaderApiTokenAuthenticator.java that allows attackers to create ephemeral in-memory user records by attempting to log in using invalid credentials.

Affected products

• Jenkins Jenkins: up to and including 2.121.2; up to and including 2.137

Published 2018-08-23. Last modified 2026-06-17.