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PatchSiren cyber security CVE debrief

CVE-2026-53438 Jenkins Project CVE debrief

CVE-2026-53438 is a medium-severity vulnerability in Jenkins that allows attackers with Item/Cancel permission, but lacking Item/Read permission, to cancel queue items they do not have permission to view. This issue affects Jenkins 2.567 and earlier, as well as LTS 2.555.2 and earlier.

Vendor
Jenkins Project
Product
Jenkins
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-11
Advisory published
2026-06-10
Advisory updated
2026-06-11

Who should care

Administrators of Jenkins instances, particularly those with untrusted users or where users have limited permissions.

Technical summary

The vulnerability is caused by a missing permission check in Jenkins. Specifically, attackers with Item/Cancel permission, but not Item/Read permission, can cancel queue items they are not authorized to view. This issue has been assigned a CVSS score of 4.3, indicating a medium severity.

Defensive priority

Medium

Recommended defensive actions

  • Update Jenkins to version 2.568 or later, or LTS 2.555.3 or later.
  • Restrict Item/Cancel permissions to trusted users.
  • Monitor Jenkins instance for unauthorized queue item cancellations.

Evidence notes

CVE-2026-53438 was published on [cvePublishedAt] and modified on [cveModifiedAt]. The vulnerability is described in the CVE record [resourceLinkAnnotations:cve-org] and detailed in the NVD entry [resourceLinkAnnotations:nvd]. The vendor advisory can be found at [resourceLinkAnnotations:ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53438 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53438

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53438 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53438

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.