Jenkins has a stored XSS vulnerability in node offline cause description

Description

References

• nvd.nist.gov/vuln/detail/CVE-2026-27099 · ADVISORY
• jenkinsci/jenkins commit 578c028 · WEB
• jenkinsci/jenkins · PACKAGE
• jenkinsci/jenkins release jenkins-2.541.2 · WEB
• jenkinsci/jenkins release jenkins-2.551 · WEB
• jenkins.io/security/advisory/2026-02-18 · WEB

More vulnerabilities in org.jenkins-ci.main:jenkins-core

• CVE-2026-53442MEDIUM 5.3Jenkins 2.567 and earlier, LTS 2.555.2 and earlier does not encrypt secrets from POST config.xml submissions before storing them in job conf…
• CVE-2026-53441MEDIUM 5.4Jenkins 2.483 through 2.567 (both inclusive), LTS 2.492.1 through 2.555.2 (both inclusive) does not escape the user-provided description of …
• CVE-2026-53440MEDIUM 4.3Jenkins 2.567 and earlier, LTS 2.555.2 and earlier does not ensure that the "from" parameter in the "Delegate to servlet container" security…
• CVE-2026-53439MEDIUM 4.3Missing permission checks in Jenkins 2.567 and earlier, LTS 2.555.2 and earlier allow attackers with Overall/Read permission to determine ot…
• CVE-2026-53438MEDIUM 4.3A missing permission check in Jenkins 2.567 and earlier, LTS 2.555.2 and earlier allows attackers with Item/Cancel permission, but lacking I…