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MEDIUM severity

CVE-2018-1000185 — github-branch-source

MEDIUMFix: jenkinsci/github-branch-source-plugin@22d3383

CVE-2018-1000185 is a medium-severity (CVSS 4.3) Server-Side Request Forgery (SSRF) vulnerability in org.jenkins-ci.plugins:github-branch-source. A fix is available for org.jenkins-ci.plugins:github-branch-source — see the affected versions and patch details below.

Jenkins GitHub Branch Source Plugin vulnerable to Server-Side Request Forgery

Also known asGHSA-9cfq-v2hm-c3xr
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs51th percentile — riskier than 51% of all scored CVEsHighest risk
0.00%0.38%0.76%1.14%0.0%0.6%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕org.jenkins-ci.plugins:github-branch-source

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

A server-side request forgery vulnerability exists in Jenkins GitHub Branch Source Plugin 2.3.4 and older in Endpoint.java that allows attackers with Overall/Read access to cause Jenkins to send a GET request to a specified URL. Additionally, this form validation method did not require POST requests, resulting in a CSRF vulnerability. As of version 23.5, this form validation method requires POST requests and the Overall/Administer permission.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:github-branch-sourceall versions2.3.5org.jenkins-ci.plugins:github-branch-source:2.3.5

Affected Products

1 product · 1 configurations
Application
github branch sourcejenkins
≤ 2.3.4
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jenkins-ci.plugins:github-branch-source, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:github-branch-source to 2.3.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-1000185 is resolved across your whole dependency graph.

  3. Workarounds

    Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Frequently Asked Questions

A server-side request forgery vulnerability exists in Jenkins GitHub Branch Source Plugin 2.3.4 and older in Endpoint.java that allows attackers with Overall/Read access to cause Jenkins to send a GET request to a specified URL. Additionally, this form validation method did not require POST requests, resulting in a CSRF vulnerability. As of version 23.5, this form validation method requires POST requests and the Overall/Administer permission.
O3 Security · Impact-Aware SCA

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CVE-2018-1000185: github-branch SSRF — Fixed in 2.3.5