# CVE-2026-42522: Jenkins GitHub Branch Source Plugin: Missing permissions check allows attackers to perform a connection test

Source: https://junglewise.ai/threats/cve-2026-42522-jenkins-github-branch-source-plugin-missing-permissions-check  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-29  
License: CC BY 4.0 with a link back

CVE-2026-42522 · Severity: medium · CVSS 4.3 · Published 2026-04-29

A missing permission check in Jenkins GitHub Branch Source Plugin 1967.vdea_d580c1a_b_a_ and earlier allows attackers with Overall/Read permission to connect to an attacker-specified URL with attacker-specified GitHub App credentials.

Technologies: [org.jenkins-ci.plugins:github-branch-source (Maven)](https://junglewise.ai/threats/technologies/org-jenkins-ci-plugins-github-branch-source). Vendors: [Jenkins](https://junglewise.ai/threats/vendors/jenkins), [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2026-42522 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-42522 being exploited in the wild.

**How severe is CVE-2026-42522?** Medium severity, with a CVSS score of 4.3, published 29 April 2026.

**Which products and versions are affected?** org.jenkins-ci.plugins:github-branch-source (Maven) ECOSYSTEM:introduced=0,fixed=1967.1969.v205fd594c821.

**Is there a fix for CVE-2026-42522?** Yes. org.jenkins-ci.plugins:github-branch-source (Maven): upgrade to 1967.1969.v205fd594c821 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-42522?** Check whether you run Jenkins Github Branch Source or org.jenkins-ci.plugins:github-branch-source (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.jenkins-ci.plugins:github-branch-source (Maven): upgrade to 1967.1969.v205fd594c821 or later

  ```sh
  # set org.jenkins-ci.plugins:github-branch-source to 1967.1969.v205fd594c821 in your pom.xml or build.gradle
  ```


## Affected products

- Jenkins Github Branch Source
- org.jenkins-ci.plugins:github-branch-source (Maven) ECOSYSTEM:introduced=0,fixed=1967.1969.v205fd594c821

## Identifiers

- CVE-2026-42522
- GHSA-wg26-8wmj-cf9p

## Related threats

- [Jenkins GitHub Branch Source Plugin missing permission check in API endpoint](https://junglewise.ai/threats/cve-2026-57285-jenkins-github-branch-source-plugin-missing-permission-check-in)
- [Jenkins GitHub Branch Source Plugin vulnerable to Cross-Site Request Forgery](https://junglewise.ai/threats/cve-2017-1000091-jenkins-github-branch-source-plugin-vulnerable-to-cross-site)
- [Jenkins GitHub Branch Source Plugin allows any user with Overall/Read permission to get list of valid credentials IDs](https://junglewise.ai/threats/cve-2017-1000087-jenkins-github-branch-source-plugin-allows-any-user-with)
- [Jenkins GitHub Branch Source Plugin vulnerable to Server-Side Request Forgery](https://junglewise.ai/threats/cve-2018-1000185-jenkins-github-branch-source-plugin-vulnerable-to-server-side)