High severity · published Sep 2, 2026
CVE-2026-84652
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…
7.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JE
Jenkins · Jenkins
before 2.568.3; before 2.580 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84652
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84652
Vendor Advisory
https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4016
More from Jenkins
9.9
CVE-2019-1003029
Jenkins Script Security Plugin Sandbox Bypass Vulnerability
9.9
CVE-2019-1003030
Jenkins Matrix Project Plugin Remote Code Execution Vulnerability
9.8
CVE-2024-23897
Jenkins Command Line Interface (CLI) Path Traversal Vulnerability
9.8
CVE-2018-1000861
A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in…
9.8
CVE-2017-1000353
Jenkins versions 2.56 and earlier as well as 2.46.1 LTS and earlier are vulnerable to an unauthenticated remote code execution