CVE-2026-27099: Jenkins has a stored XSS vulnerability in node offline cause description
(updated )
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
- github.com/advisories/GHSA-85h6-5m3v-gx37
- github.com/jenkinsci/jenkins
- github.com/jenkinsci/jenkins/commit/578c028e2cdfdc9e124d0ca389a80bb2bd231ab2
- github.com/jenkinsci/jenkins/releases/tag/jenkins-2.541.2
- github.com/jenkinsci/jenkins/releases/tag/jenkins-2.551
- nvd.nist.gov/vuln/detail/CVE-2026-27099
- www.jenkins.io/security/advisory/2026-02-18/
Code Behaviors & Features
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