CVE-2026-84652

Published: Sep 2, 2026Modified: Sep 3, 2026

7.3

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Exploitability: 2.1 / Impact: 5.2

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

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.

Related CWEs

CWE-384

Session Fixation

Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.

References (1)

https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4016

Source: jenkinsci-cert@googlegroups.com

Timeline

No history available yet.