CVE-2026-57285: Github branch source Remote Code Execution Vulnerability
MODERATECVE-2026-57285 is a MODERATE (CVSS 4.3) remote code execution vulnerability (CWE-862: Missing Authorization) affecting Github branch source libraries in the Maven ecosystem. The issue involves jenkins github branch source plugin has missing permission check that allows enumerating github enterprise server urls. Remediation is available by upgrading affected packages to version 1967.1970.
CVE-2026-57285 at a Glance
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:L/UI:N/S:U/C:L/I:N/A:N).
How to Fix CVE-2026-57285
To remediate this vulnerability, upgrade all affected Github branch source dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.jenkins-ci.plugins</groupId>
<artifactId>github-branch-source</artifactId>
<version>1967.1970</version>
</dependency>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.pluginsHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-57285, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.jenkins-ci.pluginsAnalyze the terminal output to locate any version of Github branch source in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1967.1970), 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Github branch source, 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
CVE-2026-57285 Affected Github branch source Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.jenkins-ci.plugins:github-branch-source
|
Maven |
< 1967.1970
|
1967.1970
|
References
Frequently Asked Questions
What is CVE-2026-57285?
Which Github branch source versions are affected?
What version fixes CVE-2026-57285?
Is github-branch-source affected?
What is the CVSS score of CVE-2026-57285?
What CWE is associated with CVE-2026-57285?
How can I check Maven dependencies for CVE-2026-57285?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-g7c6-wxjf-8564",
"modified" : "2026-09-25T18:10:06Z",
"published" : "2026-06-24T15:31:47Z",
"aliases" : [ "CVE-2026-57285" ],
"summary" : "Jenkins GitHub Branch Source Plugin has missing permission check that allows enumerating GitHub Enterprise server URLs",
"details" : "Jenkins GitHub Branch Source Plugin 1967.1969.v205fd594c821 and earlier does not perform a permission check in an HTTP endpoint that lists the GitHub API endpoints configured in the global plugin configuration.\n\nThis allows attackers with Overall/Read permission to obtain the URLs of GitHub Enterprise servers configured by administrators.\n\nThis vulnerability has been reported through the Jenkins Bug Bounty Program sponsored by the European Commission.\nGitHub Branch Source Plugin 1967.1970.vd86979736546 requires Overall/Manage permission or Item/Extended Read permission on an item to list the configured GitHub API endpoints.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.jenkins-ci.plugins:github-branch-source"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1967.1970"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-57285"
}, {
"type" : "WEB",
"url" : "https://github.com/jenkinsci/github-branch-source-plugin/commit/d869797365462234fe061c74fe6bf0bcae8777ea"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/jenkinsci/github-branch-source-plugin"
}, {
"type" : "WEB",
"url" : "https://github.com/jenkinsci/github-branch-source-plugin/releases/tag/1967.1970.vd86979736546"
}, {
"type" : "WEB",
"url" : "https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3808"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-862" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-09-25T18:10:06Z",
"nvd_published_at" : "2026-06-24T14:17:34Z"
}
}