What is CVE-2026-84656?

CVE-2026-84656 is a medium-severity vulnerability, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-02.

How severe is CVE-2026-84656?

Medium severity. CVSS v3 base score is 4.3 out of 10.

CVE-2026-84656

CVE-2026-84656

A missing permission check in Jenkins 2.579 and earlier, LTS 2.568.2 and earlier allows attackers with Item/Read permission on at least one job to read build parameter names and values of jobs they have no access to.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

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

Frequently asked questions

What is CVE-2026-84656?: CVE-2026-84656 is a medium-severity vulnerability, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-02.
How severe is CVE-2026-84656?: Medium severity. CVSS v3 base score is 4.3 out of 10.