GitHub Advisoryadvisory · Maven

GHSA-85h6-5m3v-gx37 Jenkins has a stored XSS vulnerability in node offline cause description

HIGH Published 2026-02-18 Modified 2026-02-25 Official page ↗
Aliases
CVE-2026-27099
Ecosystem
Maven
Packages
org.jenkins-ci.main:jenkins-core
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-79
Reviewed
2026-02-19

Affected packages

• Maven org.jenkins-ci.main:jenkins-core: >= 2.542, < 2.551 → fixed in 2.551 • Maven org.jenkins-ci.main:jenkins-core: >= 2.483, < 2.541.2 → fixed in 2.541.2

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.

Related

Alias · CVE (1)

  • CVE-2026-27099 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… vulnerability

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References