Bug 2527618 (CVE-2026-84652) - CVE-2026-84652 jenkins: Jenkins: Authentication bypass via session cookie non-rotation
Summary: CVE-2026-84652 jenkins: Jenkins: Authentication bypass via session cookie non...
Keywords:
Status: NEW
Alias: CVE-2026-84652
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-02 16:04 UTC by OSIDB Bzimport
Modified: 2026-09-28 06:40 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-09-02 16:04:31 UTC 
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.
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