CVE-2026-42519: Jenkins Script Security Plugin Missing Permission Checks Allow Enumeration Vulnerability

MODERATE
Advisory Identifier: GHSA-p334-gfhq-c7w6
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CVSS 4.3
CWE-862
Published
Advisory Summary

CVE-2026-42519 is a MODERATE (CVSS 4.3) missing permission checks allow enumeration vulnerability (CWE-862: Missing Authorization) affecting Jenkins Script Security Plugin libraries in the Maven ecosystem. The issue involves missing permission checks allow enumeration of pending and approved classpaths. Remediation is available by upgrading affected packages to version 1402.v94c9ce464861.

CVE-2026-42519 at a Glance

CVE Identifier CVE-2026-42519
GHSA Identifier GHSA-p334-gfhq-c7w6
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-862: Missing Authorization
Affected Product Jenkins Script Security Plugin
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-42519

To remediate this vulnerability, upgrade all affected Jenkins Script Security Plugin dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.jenkins-ci.plugins:script-security fixed: 1402.v94c9ce464861 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>script-security</artifactId>
    <version>1402.v94c9ce464861</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.jenkins-ci.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-42519, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jenkins-ci.plugins

Analyze the terminal output to locate any version of Jenkins Script Security Plugin in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1402.v94c9ce464861), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.plugins command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Jenkins Script Security Plugin, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-42519 Affected Jenkins Script Security Plugin Versions

1 component(s)
Fixed Versions:
1402.v94c9ce464861
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:script-security
maven/org.jenkins-ci.plugins/script-security
Maven
< 1402.v94c9ce464861
1402.v94c9ce464861

References

NVD — CVE-2026-42519 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42519
Jenkins Script Security Plugin Source Repository REPOSITORY
https://github.com/jenkinsci/script-security-plugin
Jenkins Script Security Plugin Security Information SECURITY
https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3662

Frequently Asked Questions

What is CVE-2026-42519?
CVE-2026-42519 is a security vulnerability in Jenkins Script Security Plugin involving Missing permission checks allow enumeration of pending and approved classpaths under CWE-862: Missing Authorization.
Which Jenkins Script Security Plugin versions are affected?
Affected versions include releases prior to 1402.v94c9ce464861 across affected packages: org.jenkins-ci.plugins:script-security.
What version fixes CVE-2026-42519?
Upgrading to 1402.v94c9ce464861 (or the latest patched release for your respective branch) resolves the vulnerability.
Is script-security affected?
Yes, org.jenkins-ci.plugins:script-security is affected in releases prior to 1402.v94c9ce464861. Upgrade your dependency to 1402.v94c9ce464861 or later.
What is the CVSS score of CVE-2026-42519?
CVE-2026-42519 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-42519?
CVE-2026-42519 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2026-42519?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jenkins-ci.plugins'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-p334-gfhq-c7w6",
  "modified" : "2026-05-06T22:44:55Z",
  "published" : "2026-04-29T15:30:38Z",
  "aliases" : [ "CVE-2026-42519" ],
  "summary" : "Jenkins Script Security Plugin: Missing permission checks allow enumeration of pending and approved classpaths ",
  "details" : "Jenkins Script Security Plugin versions 1399.ve6a_66547f6e1 and earlier do not perform a permission check in an HTTP endpoint.\n\nThis allows attackers with Overall/Read permission to enumerate pending and approved Script Security classpaths.\n\nScript Security Plugin 1402.v94c9ce464861 requires Overall/Administer permission to enumerate pending and approved Script Security classpaths.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:script-security"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1402.v94c9ce464861"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-42519"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/script-security-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3662"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-06T22:44:55Z",
    "nvd_published_at" : "2026-04-29T14:16:18Z"
  }
}