CVE-2026-42519Network attack vector

Authenticated classpath disclosure via unchecked JavaScript endpoint

Published Apr 29, 2026 · Updated Apr 29, 2026

Missing authorization in Jenkins Script Security Plugin 1399.ve6a_66547f6e1 and earlier lets remote authenticated users enumerate classpaths. The getClasspathRenderInfo JavaScript endpoint returns pending and approved classpath hashes and paths without checking Jenkins.ADMINISTER. Overall/Read permission is sufficient, exposing script-approval classpath information without allowing modification or service interruption.

CVSS severity4.3
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Jenkins Script Security Plugin 1399.ve6a_66547f6e1 and earlier lets remote authenticated users enumerate classpaths. The getClasspathRenderInfo JavaScript endpoint returns pending and approved classpath hashes and paths without checking Jenkins.ADMINISTER. Overall/Read permission is sufficient, exposing script-approval classpath information without allowing modification or service interruption.

The record

CVE
CVE-2026-42519
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
Jenkins Project
Product
Script Security Plugin
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1399.ve6a_66547f6e1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · Script Security Pluginversion=0 <=1399.ve6a_66547f6e1

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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