What is CVE-2026-53438?

CVE-2026-53438 is a medium-severity vulnerability in Jenkins, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-06-10.

How severe is CVE-2026-53438?

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

Auth bypass in Jenkins

CVE-2026-53438

A missing permission check in Jenkins 2.567 and earlier, LTS 2.555.2 and earlier allows attackers with Item/Cancel permission, but lacking Item/Read permission, to cancel queue items they do not have permission to view.

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:N/I:L/A:N.

Affected products

Jenkins

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

jenkinsci-cert@googlegroups.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-53438?: CVE-2026-53438 is a medium-severity vulnerability in Jenkins, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-06-10.
How severe is CVE-2026-53438?: Medium severity. CVSS v3 base score is 4.3 out of 10.