CVE-2026-57281: Script security Jenkins Script Security Plugin Has Vulnerability

HIGH
Advisory Identifier: GHSA-cfj9-2vgr-hpxp
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CVSS 7.5
CWE-917 CWE-93
Published
Advisory Summary

CVE-2026-57281 is a HIGH (CVSS 7.5) jenkins script security plugin has vulnerability (CWE-917: Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')) affecting Script security libraries in the Maven ecosystem. The issue involves jenkins script security plugin has a script security bypass vulnerability. Remediation is available by upgrading affected packages to version 1402.1405.vc96e74964250.

CVE-2026-57281 at a Glance

CVE Identifier CVE-2026-57281
GHSA Identifier GHSA-cfj9-2vgr-hpxp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-917: Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
Affected Product Script security
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

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

How to Fix CVE-2026-57281

To remediate this vulnerability, upgrade all affected Script security 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: 1402.1405.vc96e74964250 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>script-security</artifactId>
    <version>1402.1405.vc96e74964250</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-2026-57281, 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 Script security in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1402.1405.vc96e74964250), 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-917: Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection'), where the product constructs all or part of an expression language (el) statement in a framework such as a java server page (jsp) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended el statement before it is executed. In Script security, 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 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 referenced script.

CVE-2026-57281 Affected Script security Versions

1 component(s)
Fixed Versions:
1402.1405.vc96e74964250
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:script-security
maven/org.jenkins-ci.plugins/script-security
Maven
< 1402.1405.vc96e74964250
1402.1405.vc96e74964250

References

NVD — CVE-2026-57281 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57281
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/script-security-plugin/commit/c96e7496425031182b6fc11ef1c55b9ae4fa7cc2
Script security Security Information SECURITY
https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3793
Script security Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57281.json
Script security Release RELEASE
https://github.com/jenkinsci/script-security-plugin/releases/tag/1402.1405.vc96e74964250
Script security Source Repository REPOSITORY
https://github.com/jenkinsci/script-security-plugin
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2492200
Script security Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-57281
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60259
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60256
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60254
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60252
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60251
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60250
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60249
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60248
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60247
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60246
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60239

Frequently Asked Questions

What is CVE-2026-57281?
CVE-2026-57281 is a security vulnerability in Script security involving Jenkins Script Security Plugin has a script security bypass vulnerability under CWE-917: Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection').
Which Script security versions are affected?
Affected versions include releases prior to 1402.1405.vc96e74964250 across affected packages: org.jenkins-ci.plugins:script-security.
What version fixes CVE-2026-57281?
Upgrading to 1402.1405.vc96e74964250 (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 1402.1405.vc96e74964250. Upgrade your dependency to 1402.1405.vc96e74964250 or later.
What is the CVSS score of CVE-2026-57281?
CVE-2026-57281 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-57281?
CVE-2026-57281 is classified under CWE-917: Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection') (The product constructs all or part of an expression language (EL) statement in a framework such as a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.).
How can I check Maven dependencies for CVE-2026-57281?
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-cfj9-2vgr-hpxp",
  "modified" : "2026-09-25T18:06:01Z",
  "published" : "2026-06-24T15:31:47Z",
  "aliases" : [ "CVE-2026-57281" ],
  "summary" : "Jenkins Script Security Plugin has a script security bypass vulnerability",
  "details" : "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.\n\nThis 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.\n\nThe 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.\n\nScript Security Plugin 1402.1405.vc96e74964250 rejects any annotation carrying an extensions member during sandbox compilation, before Groovy can resolve or execute the referenced script.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:script-security"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1402.1405.vc96e74964250"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-57281"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/script-security-plugin/commit/c96e7496425031182b6fc11ef1c55b9ae4fa7cc2"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3793"
  }, {
    "type" : "WEB",
    "url" : "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57281.json"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/script-security-plugin/releases/tag/1402.1405.vc96e74964250"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/script-security-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2492200"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-57281"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60259"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60256"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60254"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60252"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60251"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60250"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60249"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60248"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60247"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60246"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:60239"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-917", "CWE-93" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-25T18:06:00Z",
    "nvd_published_at" : "2026-06-24T14:17:34Z"
  }
}