Is CVE-2026-84677 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-84677?

CVE-2026-84677 has a CVSS v3 severity of MEDIUM (5.4).

Back

CVE-2026-84677

Description

Jenkins update-center2 3.18.3 and earlier does not escape plugin-provided values (plugin names, descriptions, and version metadata) on plugin download index pages, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to provide a plugin for hosting.