# CVE-2026-42519: script-security — Fix Available

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

# CVE-2026-42519 — script-security

MEDIUM 

CVE-2026-42519 is a medium-severity (CVSS 4.3) CWE-862 vulnerability in org.jenkins-ci.plugins:script-security. A fix is available for org.jenkins-ci.plugins:script-security — see the affected versions and patch details below.

Jenkins Script Security Plugin: Missing permission checks allow enumeration of pending and approved classpaths

Also known as[GHSA-p334-gfhq-c7w6](/vulnerability/GHSA-p334-gfhq-c7w6)

Published

Apr 29, 2026

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

## Exploitation Status

### No confirmed exploitation observed yet

-   CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-42519.

## EPSS Exploitation Probability

[via FIRST.org ↗](https://www.first.org/epss/)

0.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs7th percentile — riskier than 7% of all scored CVEsHighest risk

0.00%0.26%0.52%0.78%0.0%0.2%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from [FIRST.org EPSS](https://www.first.org/epss/).

## How urgent is this, really

## Where this sits among everything scored

## Real-World Exposure

1 pkg affected

☕`org.jenkins-ci.plugins:script-security`

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

## Description

Jenkins Script Security Plugin versions 1399.ve6a\_66547f6e1 and earlier do not perform a permission check in an HTTP endpoint.

This allows attackers with Overall/Read permission to enumerate pending and approved Script Security classpaths.

Script Security Plugin 1402.v94c9ce464861 requires Overall/Administer permission to enumerate pending and approved Script Security classpaths.

## Affected Packages

1 total 1 fixed

Ecosystem

Package

Vulnerable range

Fix

☕Maven

`org.jenkins-ci.plugins:script-security` 

all versions

1402.v94c9ce464861`org.jenkins-ci.plugins:script-security:1402.v94c9ce464861`

## Affected Products

1 product · 1 configurations

Application

`script security`jenkins

≤ 1399.ve6a\_66547f6e1

range

## Detection & mitigation playbook

Open-source dependency

1.  ### Detect
    
    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jenkins-ci.plugins:script-security, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
    
2.  ### Fix
    
    Update org.jenkins-ci.plugins:script-security to 1402.v94c9ce464861 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-42519 is resolved across your whole dependency graph.
    
3.  ### Workarounds
    
    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.
    

## Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Workaround published by Red Hat

> Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Source: [Red Hat security advisory for CVE-2026-42519](https://access.redhat.com/security/cve/cve-2026-42519) (CC BY 4.0)

## Frequently Asked Questions

Jenkins Script Security Plugin versions 1399.ve6a\_66547f6e1 and earlier do not perform a permission check in an HTTP endpoint. This allows attackers with Overall/Read permission to enumerate pending and approved Script Security classpaths. Script Security Plugin 1402.v94c9ce464861 requires Overall/Administer permission to enumerate pending and approved Script Security classpaths.

O3 Security · Impact-Aware SCA

### Is CVE-2026-42519 in your dependencies?

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