CVE-2026-27099

HIGH

Jenkins 2.483-2.550 - Stored XSS

Title source: llm

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)

[Vendor Advisory] https://www.jenkins.io/security/advisory/2026-02-18/#SECURITY-3669

Scores

CVSS v3 8.0

EPSS 0.0004

EPSS Percentile 13.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Classification

CWE

CWE-79

Status published

Affected Products (3)

org.jenkins-ci.main/jenkins-core < 2.551Maven

jenkins/jenkins < 2.551

jenkins/jenkins < 2.541.2

Timeline

Published Feb 18, 2026

Tracked Since Feb 18, 2026