CVE-2026-9674: Jenkins multijob plugin Jenkins Multijob Plugin Has A Vulnerability

MODERATE
Advisory Identifier: GHSA-hj3h-r49w-34wh
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CVSS 4.3
CWE-352
Published
Advisory Summary

CVE-2026-9674 is a MODERATE (CVSS 4.3) jenkins multijob plugin has a vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting Jenkins multijob plugin libraries in the Maven ecosystem. The issue involves jenkins multijob plugin has a cross-site request forgery (csrf) vulnerability. Remediation is available by upgrading affected packages to version 669.v9d96a.

CVE-2026-9674 at a Glance

CVE Identifier CVE-2026-9674
GHSA Identifier GHSA-hj3h-r49w-34wh
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product Jenkins multijob plugin
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

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

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

How to Fix CVE-2026-9674

To remediate this vulnerability, upgrade all affected Jenkins multijob plugin 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:jenkins-multijob-plugin fixed: 669.v9d96a 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>jenkins-multijob-plugin</artifactId>
    <version>669.v9d96a</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-2026-9674, 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 Jenkins multijob plugin in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 669.v9d96a), 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-352: Cross-Site Request Forgery (CSRF), where the web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. In Jenkins multijob plugin, 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 Multijob Plugin 662.vd2e0001f6b_b_d and earlier does not require POST requests for an HTTP endpoint, resulting in a cross-site request forgery (CSRF) vulnerability. This vulnerability allows attackers to resume failed Multijob builds. Multijob Plugin 669.v9d96a_d9c71b_0 requires POST requests for the affected HTTP endpoint.

CVE-2026-9674 Affected Jenkins multijob plugin Versions

1 component(s)
Fixed Versions:
669.v9d96a
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:jenkins-multijob-plugin
maven/org.jenkins-ci.plugins/jenkins-multijob-plugin
Maven
< 669.v9d96a
669.v9d96a

References

NVD — CVE-2026-9674 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9674
Jenkins multijob plugin Source Repository REPOSITORY
https://github.com/jenkinsci/jenkins-multijob-plugin
Jenkins multijob plugin Security Information SECURITY
https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3781

Frequently Asked Questions

What is CVE-2026-9674?
CVE-2026-9674 is a security vulnerability in Jenkins multijob plugin involving Jenkins Multijob Plugin has a cross-site request forgery (CSRF) vulnerability under CWE-352: Cross-Site Request Forgery (CSRF).
Which Jenkins multijob plugin versions are affected?
Affected versions include releases prior to 669.v9d96a across affected packages: org.jenkins-ci.plugins:jenkins-multijob-plugin.
What version fixes CVE-2026-9674?
Upgrading to 669.v9d96a (or the latest patched release for your respective branch) resolves the vulnerability.
Is jenkins-multijob-plugin affected?
Yes, org.jenkins-ci.plugins:jenkins-multijob-plugin is affected in releases prior to 669.v9d96a. Upgrade your dependency to 669.v9d96a or later.
What is the CVSS score of CVE-2026-9674?
CVE-2026-9674 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2026-9674?
CVE-2026-9674 is classified under CWE-352: Cross-Site Request Forgery (CSRF) (The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.).
How can I check Maven dependencies for CVE-2026-9674?
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-hj3h-r49w-34wh",
  "modified" : "2026-07-01T19:46:00Z",
  "published" : "2026-05-27T15:33:28Z",
  "aliases" : [ "CVE-2026-9674" ],
  "summary" : "Jenkins Multijob Plugin has a cross-site request forgery (CSRF) vulnerability",
  "details" : "Jenkins Multijob Plugin 662.vd2e0001f6b_b_d and earlier does not require POST requests for an HTTP endpoint, resulting in a cross-site request forgery (CSRF) vulnerability.\n\nThis vulnerability allows attackers to resume failed Multijob builds.\n\nMultijob Plugin 669.v9d96a_d9c71b_0 requires POST requests for the affected HTTP endpoint.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:jenkins-multijob-plugin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "669.v9d96a"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-9674"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/jenkins-multijob-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3781"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-01T19:46:00Z",
    "nvd_published_at" : "2026-05-27T15:16:36Z"
  }
}