CVE-2018-1000193: Jenkins

Medium severity, CVSS 4.3. EPSS: 1% chance of exploitation in the next 30 days.

A improper neutralization of control sequences vulnerability exists in Jenkins 2.120 and older, LTS 2.107.2 and older in HudsonPrivateSecurityRealm.java that allows users to sign up using user names containing control characters that can then appear to have the same name as other users, and cannot be deleted via the UI.

Affected products

• Jenkins Jenkins: up to and including 2.120; up to and including 2.107.2
• Oracle Communications Cloud Native Core Automated Test Suite: version 1.9.0 only

Published 2018-06-05. Last modified 2026-06-17.