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CVE-2026-84648

high CVSS 8.8 EPSS 0.6%

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.

Versions it affects

Software versions checked with the free lookup that CVE-2026-84648 applies to, and the release that fixes it where the sources name one.

Jenkins 1.509 fixed in 2.580

At a glance

Severity
High
CVSS base score
8.8 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.6% probability of exploitation in the next 30 days, higher than 46% of scored vulnerabilities
Weakness
CWE-79
Published
2026-09-02
NVD CVE.org

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