{"id":"CVE-2026-57294","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-57294","summary":"Jenkins EC2 Fleet Plugin has a missing permission check","details":"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.\n\nThis 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.\n\nAdditionally, these HTTP endpoints do not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.\n\nEC2 Fleet Plugin 4.2.3.540.va_6eedb_7b_c112 requires Overall/Administer permission and POST requests to perform these form validation actions.","published":"2026-06-24T15:31:47Z","modified":"2026-09-25T19:15:04.531821831Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"com.amazon.jenkins.fleet:ec2-fleet","fixedVersion":"4.2.3.540.va"}],"fix":{"url":"https://github.com/jenkinsci/ec2-fleet-plugin/pull/531","label":"jenkinsci/ec2-fleet-plugin#531"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-57294"},{"type":"WEB","url":"https://github.com/jenkinsci/ec2-fleet-plugin/pull/531"},{"type":"WEB","url":"https://github.com/jenkinsci/ec2-fleet-plugin/commit/a6eedb7bc112de92bbba179c03840d845b845c82"},{"type":"PACKAGE","url":"https://github.com/jenkinsci/ec2-fleet-plugin"},{"type":"WEB","url":"https://github.com/jenkinsci/ec2-fleet-plugin/releases/tag/4.2.3.540.va_6eedb_7b_c112"},{"type":"WEB","url":"https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3774"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-25T19:15:04.531821831Z"}}