GHSA-9v77-j4xv-34gq
Jenkins EC2 Fleet Plugin has a missing permission check
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Maven | com.amazon.jenkins.fleet:ec2-fleet | < 4.2.3.540.va | 4.2.3.540.va |
Details
As written in the advisory (Markdown source, shown as plain text).
Jenkins EC2 Fleet Plugin 4.2.3.539.v8fedff2a_81c3 and earlier does not perform permission checks in several HTTP endpoints used to validate cloud configurations.
This allows attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing AWS credentials stored in Jenkins.
Additionally, these HTTP endpoints do not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.
EC2 Fleet Plugin 4.2.3.540.va_6eedb_7b_c112 requires Overall/Administer permission and POST requests to perform these form validation actions.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2026-57294
- https://github.com/jenkinsci/ec2-fleet-plugin/pull/531
- https://github.com/jenkinsci/ec2-fleet-plugin/commit/a6eedb7bc112de92bbba179c03840d845b845c82
- https://github.com/jenkinsci/ec2-fleet-plugin
- https://github.com/jenkinsci/ec2-fleet-plugin/releases/tag/4.2.3.540.va_6eedb_7b_c112
- https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3774