PatchTheCVECVE-2026-84657: In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the build CLI command does not check the Item/Cancel pe
CVE-2026-84657 is a medium-severity flaw (CVSS 4.2) affecting jenkins. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the build CLI command does not check the Item/Cancel permission when using the -s flag to cancel a build triggered to wait for completion, allowing attackers with Item/Build permission to cancel builds started by other users.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.2 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 83%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2026-09-02 |
| Last modified | 2026-09-15 |
Last updated 2026-09-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-84657?
jenkins: upgrade to newer than 2.579. Exact commands for each OS are on this page.
Is CVE-2026-84657 being exploited?
CVE-2026-84657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-84657 affect?
CVE-2026-84657 affects jenkins. Severity is medium (CVSS 4.2). In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the build CLI command does not check the Item/Cancel permission when using the -s flag to cancel a build triggered to wait for completion, allowing attackers with Item/Build permission
How urgent is CVE-2026-84657?
Priority 19/100. No elevated risk signals yet.
Software pages
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