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CVE-2026-84652

high CVSS 7.3 EPSS 0.4%

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.

Versions it affects

Software versions checked with the free lookup that CVE-2026-84652 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
7.3 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.4% probability of exploitation in the next 30 days, higher than 36% of scored vulnerabilities
Weakness
CWE-384
Published
2026-09-02
NVD CVE.org

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