Missing Authorization in Jenkins and Jenkins LTS - CVE-2026-84657
Published: September 4, 2026
Vulnerability identifier: #VU146944
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84657
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to missing authorization check within the build CLI command. A remote user can cancel builds started by other users by triggering a build that merges with an existing queue item.
Affected software
Jenkins
Jenkins LTS
Jenkins LTS
How to mitigate CVE-2026-84657
Install updates from vendor's website.
Jenkins - update to 2.580
Jenkins LTS - update to 2.568.3
Jenkins LTS - update to 2.568.3