CVE-2026-84652: Jenkins

High severity, CVSS 7.3. EPSS: 0.4% chance of exploitation in the next 30 days.

In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, Jenkins does not rotate the session when a user is authenticated via the "remember me" cookie, allowing attackers able to serve content on the same site as Jenkins to set a known session cookie in the victim's browser, which after the victim authenticates via the "remember me" cookie, grants the attacker access to Jenkins as that user.

Affected products

• Jenkins Jenkins: before 2.568.3 (fixed in 2.568.3); before 2.580 (fixed in 2.580)

Published 2026-09-02. Last modified 2026-09-11.