CVE-2026-27099
February 18, 2026
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.
Affected Packages
https://github.com/jenkinsci/jenkins.git (GITHUB):
Affected version(s) >=jenkins-2.483 <jenkins-2.551Fix Suggestion:
Update to version jenkins-2.551https://github.com/jenkinsci/jenkins.git (GITHUB):
Affected version(s) >=jenkins-2.480 <jenkins-2.541.2Fix Suggestion:
Update to version jenkins-2.541.2org.jenkins-ci.main:jenkins-core (JAVA):
Affected version(s) >=2.483 <2.541.2Fix Suggestion:
Update to version 2.541.2org.jenkins-ci.main:jenkins-core (JAVA):
Affected version(s) >=2.479.1 <2.541.1Fix Suggestion:
Update to version 2.541.1org.jenkins-ci.main:jenkins-core (JAVA):
Affected version(s) >=2.483 <2.551Fix Suggestion:
Update to version 2.551org.jenkins-ci.main:jenkins-core (JAVA):
Affected version(s) >=2.542 <2.551Fix Suggestion:
Update to version 2.551Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.04
