Jenkins Script Security Plugin sandbox bypass vulnerability (CVE-2026-57280)

Jenkins Script Security Plugin sandbox bypass vulnerability (CVE-2026-57280) | HOL Guard CVE

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps org.jenkins-ci.plugins:script-security (maven), org.jenkins-ci.plugins:script-security (maven). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
org.jenkins-ci.plugins:script-securitymaven	<1402.1405.vc96e74964250	1402.1405.vc96e74964250
org.jenkins-ci.plugins:script-securitymaven	>=0 <1402.1405.vc96e74964250	1402.1405.vc96e74964250

Recommended response

Check inventory. Check lockfiles and deployed manifests for org.jenkins-ci.plugins:script-security, org.jenkins-ci.plugins:script-security.
Review the reported fix. Update org.jenkins-ci.plugins:script-security to 1402.1405.vc96e74964250; org.jenkins-ci.plugins:script-security to 1402.1405.vc96e74964250 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jun 24, 2026
Evidence: source:ghsa:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:ghsa:source_dates:source-dates:record
First seen by HOL
Jun 24, 2026

Sources and claim methodology

Upstream source description

Jenkins Script Security Plugin provides a sandbox feature that allows running user-provided scripts safely by intercepting and checking potentially unsafe operations. Script Security Plugin 1402.v94c9ce464861 and earlier does not intercept the implicit type cast applied to each element of the iterated collection in a typed for loop (e.g. for (Type t in collection)), as this cast is performed during bytecode generation rather than in the transformed script AST. This allows attackers able to provide sandboxed scripts to invoke constructors of arbitrary types without those invocations being checked by the sandbox, bypassing the sandbox protection. This can be used to execute arbitrary code on the Jenkins controller. Script Security Plugin 1402.1405.vc96e74964250 updates the bundled groovy-sandbox library to a version that intercepts the implicit type cast applied to typed for loop elements, so those casts are checked by the sandbox.

Quoted source text, attributed separately from HOL analysis.