CVE-2026-84648

In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the system log viewer does not escape log record metadata (source, level, and timestamp) resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers in control of agent processes.

Score

CVSS 3.1 8.8 High

Status

Analyzed - jenkinsci-cert@googlegroups.com

Published

2026-09-02

Last modified

2026-09-02

Weaknesses

CWE-79

Affected products

• Jenkins (Jenkins)
• Jenkins (Jenkins Project)

References

• https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3967