CVE-2026-27099

HIGH

Jenkins 2.483-2.550 and LTS 2.492.1-2.541.1 - Stored Cross-Site Scripting in Offline Cause Description

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 8.0
EPSS 0.0007
EPSS Percentile 22.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-79
Status published
Products (3)
jenkins/jenkins 2.483 - 2.551
jenkins/jenkins 2.492.1 - 2.541.2
org.jenkins-ci.main/jenkins-core 2.483 - 2.551Maven
Published Feb 18, 2026
Tracked Since Feb 18, 2026