Summary
Jenkins GitHub Branch Source Plugin has missing permission check that allows enumerating GitHub Enterprise server URLs
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.
This allows attackers with Overall/Read permission to obtain the URLs of GitHub Enterprise servers configured by administrators.
This vulnerability has been reported through the Jenkins Bug Bounty Program sponsored by the European Commission.
GitHub 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.
Impact
The application does not perform an authorization check before performing a sensitive operation. Typical impact: unauthorized access to restricted functionality or data.
CVE-2026-57285 has a CVSS score of 4.3 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1967.1970); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is CVE-2026-57285? CVE-2026-57285 is a medium-severity missing authorization vulnerability in org.jenkins-ci.plugins:github-branch-source (maven), affecting versions < 1967.1970. It is fixed in 1967.1970. The application does not perform an authorization check before performing a sensitive operation.
- How severe is CVE-2026-57285? CVE-2026-57285 has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of org.jenkins-ci.plugins:github-branch-source are affected by CVE-2026-57285? org.jenkins-ci.plugins:github-branch-source (maven) versions < 1967.1970 is affected.
- Is there a fix for CVE-2026-57285? Yes. CVE-2026-57285 is fixed in 1967.1970. Upgrade to this version or later.
- Is CVE-2026-57285 exploitable, and should I be worried? Whether CVE-2026-57285 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-57285 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-57285? Upgrade
org.jenkins-ci.plugins:github-branch-sourceto 1967.1970 or later.