# CVE-2026-42519: Jenkins Script Security Plugin: Missing permission checks allow enumeration of pending and approved classpaths

Source: https://junglewise.ai/threats/cve-2026-42519-jenkins-script-security-plugin-missing-permission-checks-allow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-29  
License: CC BY 4.0 with a link back

CVE-2026-42519 · Severity: medium · CVSS 4.3 · Published 2026-04-29

A missing permission check in Jenkins Script Security Plugin 1399.ve6a_66547f6e1 and earlier allows attackers with Overall/Read permission to enumerate pending and approved Script Security classpaths.

Technologies: [Jenkins Script Security](https://junglewise.ai/threats/technologies/script-security), [org.jenkins-ci.plugins:script-security (Maven)](https://junglewise.ai/threats/technologies/org-jenkins-ci-plugins-script-security). Vendors: [Jenkins](https://junglewise.ai/threats/vendors/jenkins), [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2026-42519 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-42519 being exploited in the wild.

**How severe is CVE-2026-42519?** Medium severity, with a CVSS score of 4.3, published 29 April 2026.

**Which products and versions are affected?** org.jenkins-ci.plugins:script-security (Maven) ECOSYSTEM:introduced=0,fixed=1402.v94c9ce464861.

**Is there a fix for CVE-2026-42519?** Yes. org.jenkins-ci.plugins:script-security (Maven): upgrade to 1402.v94c9ce464861 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-42519?** Check whether you run Jenkins Script Security or org.jenkins-ci.plugins:script-security (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.jenkins-ci.plugins:script-security (Maven): upgrade to 1402.v94c9ce464861 or later

  ```sh
  # set org.jenkins-ci.plugins:script-security to 1402.v94c9ce464861 in your pom.xml or build.gradle
  ```


## Affected products

- Jenkins Script Security
- org.jenkins-ci.plugins:script-security (Maven) ECOSYSTEM:introduced=0,fixed=1402.v94c9ce464861

## Identifiers

- CVE-2026-42519
- GHSA-p334-gfhq-c7w6

## Related threats

- [Jenkins Script Security Plugin sandbox bypass with dynamic methods](https://junglewise.ai/threats/cve-2026-92129-jenkins-script-security-plugin-sandbox-bypass-with-dynamic)
- [Jenkins Script Security Plugin arbitrary JAR loading via double download](https://junglewise.ai/threats/cve-2026-92128-jenkins-script-security-plugin-arbitrary-jar-loading-via-double)
- [Jenkins Script Security Plugin classpath approval bypass](https://junglewise.ai/threats/cve-2026-92127-jenkins-script-security-plugin-classpath-approval-bypass)
- [Jenkins Script Security Plugin sandbox bypass via @Builder annotation](https://junglewise.ai/threats/cve-2026-92126-jenkins-script-security-plugin-sandbox-bypass-via-builder)
- [Jenkins Script Security Plugin sandbox bypass via @GroovyASTTransformationClass](https://junglewise.ai/threats/cve-2026-92125-jenkins-script-security-plugin-sandbox-bypass-via)