Jenkins has a stored XSS vulnerability in node offline cause description

GHSA-85h6-5m3v-gx37 · BIT-jenkins-2026-27099 · CVE-2026-27099

Published Feb 18, 2026 · Modified Feb 25, 2026

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

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-27099
WEB https://github.com/jenkinsci/jenkins/commit/578c028e2cdfdc9e124d0ca389a80bb2bd231ab2
PACKAGE https://github.com/jenkinsci/jenkins
WEB https://github.com/jenkinsci/jenkins/releases/tag/jenkins-2.541.2
WEB https://github.com/jenkinsci/jenkins/releases/tag/jenkins-2.551
WEB https://www.jenkins.io/security/advisory/2026-02-18/#SECURITY-3669

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