CVE-2026-53438 Jenkins: Missing permission check allows unauthorized cancellation of queue items

What is CVE-2026-53438?

CVE-2026-53438 is a medium-severity missing authorization vulnerability in Jenkins Jenkins, published on 10 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-862

Which versions are affected by CVE-2026-53438?

5 open source packages ship an affected version, including org.jenkins-ci.main:jenkins-core and jenkins. It affects 1 product.

Products include Jenkins Jenkins.

How do I fix CVE-2026-53438?

Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 2.555.3 or 2.568.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-53438 being exploited?

There is no known exploitation of CVE-2026-53438 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Jenkins

• CVE-2024-23897 Jenkins Command Line Interface (CLI) Path Traversal Exploited Critical 9.8
• CVE-2018-1000861 Jenkins Stapler Web Framework Deserialization of Untrusted Data Exploited Critical 9.8
• CVE-2017-1000353 Jenkins Remote Code Execution Exploited Critical 9.8
• CVE-2015-5317 Jenkins User Interface (UI) Information Disclosure Exploited High 7.5
• CVE-2021-21690 Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins Critical 9.8

All Jenkins Jenkins vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-jenkins-2026-53438, GHSA-mw82-xcg6-gx79, MINI-2vfg-f378-v774, MINI-383m-j692-xmvh, MINI-5fm7-36qx-54x2, MINI-927p-m3wx-3vvg and 3 more.