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Actively exploited

CVE-2019-1003029 Jenkins Script Security Plugin Sandbox Bypass Vulnerability

Jenkins Script Security Plugin contains a protection mechanism failure, allowing an attacker to bypass the sandbox.

From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.

Our Assessment

Should You Worry?

Patch nowCybergen assessment
  • CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 25 Apr 2022.
  • Rated Critical severity (CVSS 9.9, scored by CISA).
  • This product type is often exposed to the internet, which is where attackers scan for it first.
  • It has been in the catalogue for 1,656 days. Systems still unpatched now have almost certainly been scanned for it.
The Vulnerability

What It Is

A sandbox bypass vulnerability exists in Jenkins Script Security Plugin 1.53 and earlier in src/main/java/org/jenkinsci/plugins/scriptsecurity/sandbox/groovy/GroovySandbox.java, src/main/java/org/jenkinsci/plugins/scriptsecurity/sandbox/groovy/SecureGroovyScript.java that allows attackers with Overall/Read permission to execute arbitrary code on the Jenkins master JVM.

Affected Versions

ProductVersions
Jenkins project Jenkins Script Security Plugin1.53 and earlier

From the public CVE record, as supplied by the vendor. Always confirm against the vendor advisory.

From Watch to Action

What To Do Now

  1. 1

    Find it

    Search your asset inventory and external attack surface for Jenkins Script Security Plugin. Include cloud images, appliances and anything a supplier runs for you.

    Attack Surface Management
  2. 2

    Fix it

    Apply updates per vendor instructions.

    Vulnerability Management
  3. 3

    Hunt for compromise

    If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.

    Incident Response
  4. 4

    Prove it is fixed

    Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.

    Penetration Testing

Vendor Advisories

Regulation

The Compliance Clock

Cyber EssentialsRated critical, so if it affects devices in your Cyber Essentials scope, the update must be installed within 14 days of the vendor releasing it.NIS2If exploitation causes a significant incident, essential and important entities owe their CSIRT an early warning within 24 hours and a notification within 72 hours.DORAFinancial entities must classify ICT incidents and send an initial notification for a major incident within strict deadlines, with exploited flaws a common cause.US federal (BOD 22-01)Federal civilian agencies had until 16 May 2022 to remediate. A sensible benchmark for everyone else.

General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.

Stay Ahead

More Exploited Jenkins Flaws

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CVE-2017-1000353Jenkins Remote Code Execution VulnerabilityAdded 2 Oct 2025CVE-2024-23897 · RansomwareJenkins Command Line Interface (CLI) Path Traversal VulnerabilityAdded 19 Aug 2024CVE-2015-5317Jenkins User Interface (UI) Information Disclosure VulnerabilityAdded 12 May 2023CVE-2019-1003030Jenkins Matrix Project Plugin Remote Code Execution VulnerabilityAdded 25 Mar 2022CVE-2018-1000861Jenkins Stapler Web Framework Deserialization of Untrusted Data VulnerabilityAdded 10 Feb 2022

All 6 exploited Jenkins vulnerabilities

Not Sure If You Are Exposed?

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Evidence

Sources

  1. CISA Known Exploited Vulnerabilities catalogue
  2. NVD: CVE-2019-1003029
  3. CVE record: CVE-2019-1003029
  4. FIRST EPSS
  5. jenkins.io/security/advisory/2019-03-06/#SECURITY-1336%20%281%29
  6. securityfocus.com/bid/107476
  7. access.redhat.com/errata/RHSA-2019:0739
  8. packetstormsecurity.com/files/166778/Jenkins-Remote-Code-Execution.html