PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-53442 Jenkins Project CVE debrief

CVE-2026-53442 is a medium-severity vulnerability affecting Jenkins versions 2.567 and earlier, as well as LTS versions 2.555.2 and earlier. The vulnerability causes Jenkins to store secrets from POST config.xml submissions in an unencrypted format in job config.xml files on the Jenkins controller. This allows users with Item/Extended Read permission or access to the Jenkins controller file system to view these secrets.

Vendor
Jenkins Project
Product
Jenkins
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-12
Advisory published
2026-06-10
Advisory updated
2026-06-12

Who should care

Users of Jenkins versions 2.567 and earlier, LTS versions 2.555.2 and earlier, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability has a CVSS score of 5.3 and a CVSS severity of MEDIUM. It was published on June 10, 2026, and modified on June 12, 2026. The vulnerability is classified under CWE-311, which refers to the Cleartext Storage of Sensitive Information.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade to Jenkins version 2.568 or later, or LTS version 2.555.3 or later.
  • Restrict access to job configurations to prevent unauthorized users from viewing secrets.
  • Use encryption to protect sensitive data in job configurations.

Evidence notes

The vulnerability was reported by Jenkins and documented in their security advisory [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53442 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53442

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

  • CVE-2026-53442 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53442

    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.