Jenkins Script Security Plugin has a script security bypass vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.5 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2026-57281: 0.92% estimated exploitation activity in the next 30 days; percentile 60.44 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Jenkins Script Security Plugin 1402.v94c9ce464861 and earlier does not reject Groovy AST transformation annotations such as @CompileStatic and @TypeChecked that carry an extensions member, which causes Groovy to load and execute a script from the classpath at compile time, before the sandbox is applied. This may allow attackers able to define and run sandboxed scripts to execute code outside the sandbox, in the rare case that a suitable Groovy script is present on the classpath of the component that evaluates the script. The Jenkins security team has been unable to identify any Groovy source files in Jenkins core or plugins that would allow attackers to execute dangerous code. While the severity of this issue is declared as High due to the potential impact, successful exploitation is considered very unlikely. Script Security Plugin 1402.1405.vc96e74964250 rejects any annotation carrying an extensions member during sandbox compilation, before Groovy can resolve or execute the…

Published by the source

24 Jun 2026, 15:31 UTC

Last modified by the source

25 Sep 2026, 18:06 UTC

Source last checked

26 Oct 2026, 16:55 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-cfj9-2vgr-hpxp

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# Patch Next advisory brief: CVE-2026-57281

Advisory: Jenkins Script Security Plugin has a script security bypass vulnerability
IDs: CVE-2026-57281, GHSA-cfj9-2vgr-hpxp
Record: https://patchnext.com/advisories/cve-2026-57281 (revision 1, source checked 26 Oct 2026, 16:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.jenkins-ci.plugins:script-security 1402.1405.vc96e74964250. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.jenkins-ci.plugins:script-security: affected < 1402.1405.vc96e74964250; fixed in 1402.1405.vc96e74964250

## Suggested inspection (read-only)
- Maven org.jenkins-ci.plugins:script-security: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.jenkins-ci.plugins:script-security.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-cfj9-2vgr-hpxp (GitHub-reviewed advisory GHSA-cfj9-2vgr-hpxp lists affected ranges: Maven org.jenkins-ci.plugins:script-security >=0 <1402.1405.vc96e74964250)

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