A sandbox bypass vulnerability in Jenkins Script Security Plugin 1.61 and earlier related to the handling of type casts allowed attackers to execute arbitrary code in sandboxed scripts.
https://jenkins.io/security/advisory/2019-07-31/#SECURITY-1465%20%281%29
https://access.redhat.com/errata/RHSA-2019:2662
https://access.redhat.com/errata/RHSA-2019:2651