Jenkins Script Security Plugin 1402.v94c9ce464861 and earlier does not reject Groovy AST transformation annotations carrying an extensions member, allowing attackers able to run sandboxed Groovy scripts to execute code outside the sandbox if a suitable script is present on the classpath of the component that evaluates the script.
https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3793
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57281.json
https://bugzilla.redhat.com/show_bug.cgi?id=2492200
https://access.redhat.com/security/cve/CVE-2026-57281
https://access.redhat.com/errata/RHSA-2026:60259
https://access.redhat.com/errata/RHSA-2026:60254
https://access.redhat.com/errata/RHSA-2026:60251
https://access.redhat.com/errata/RHSA-2026:60250
https://access.redhat.com/errata/RHSA-2026:60247