What is CVE-2026-84657?

CVE-2026-84657 is a medium-severity vulnerability, classified under Missing Authorization. CVSS score: 4.2/10. Published 2026-09-02.

How severe is CVE-2026-84657?

Medium severity. CVSS v3 base score is 4.2 out of 10.

CVE-2026-84657

CVE-2026-84657

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.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L.

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

jenkinsci-cert@googlegroups.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-84657?: CVE-2026-84657 is a medium-severity vulnerability, classified under Missing Authorization. CVSS score: 4.2/10. Published 2026-09-02.
How severe is CVE-2026-84657?: Medium severity. CVSS v3 base score is 4.2 out of 10.