Bug 2440638 (CVE-2026-27099) - CVE-2026-27099 org.jenkins-ci.main/jenkins-core: Jenkins: Stored Cross-site Scripting (XSS) via unescaped user-provided offline cause description
Summary: CVE-2026-27099 org.jenkins-ci.main/jenkins-core: Jenkins: Stored Cross-site S...
Keywords:
Status: NEW
Alias: CVE-2026-27099
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-18 15:03 UTC by OSIDB Bzimport
Modified: 2026-02-18 21:46 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-02-18 15:03:14 UTC 
Jenkins 2.483 through 2.550 (both inclusive), LTS 2.492.1 through 2.541.1 (both inclusive) does not escape the user-provided description of the "Mark temporarily offline" offline cause, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Agent/Configure or Agent/Disconnect permission.
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