A missing permission check in Jenkins Pipeline: Shared Groovy Libraries Plugin 2.14 and earlier allowed users with Overall/Read access to obtain limited information about the content of SCM repositories referenced by global libraries.
https://jenkins.io/security/advisory/2019-07-31/#SECURITY1422
https://access.redhat.com/errata/RHSA-2019:2662
https://access.redhat.com/errata/RHSA-2019:2651