Permission Check Flaw in Jenkins by CloudBees
CVE-2026-53438

4.3MEDIUM

Key Information:

Vendor

Jenkins
Status
Jenkins
Vendor
CVE Published:
10 June 2026

What is CVE-2026-53438?

A critical flaw in Jenkins, specifically in versions 2.567 and earlier, as well as in LTS versions 2.555.2 and earlier, allows attackers with Item/Cancel permissions to cancel queued items without having Item/Read permissions. This lack of a necessary permission check opens up the potential for unauthorized manipulation of item queues, which could lead to significant disruptions in CI/CD workflows.

Affected Version(s)

Jenkins 2.568

Jenkins 2.568

Jenkins 2.555.3 < 2.555.*

References

https://www.jenkins.io/security/advisory/2026-06-10/#SECU...
vendor-advisory

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.