Computer#addAction would throw an UnsupportedOperationException since Jenkins 2.30. Such a call site was released in SSH Build Agents Plugin 1.15 for SECURITY-161.
JENKINS-42969, security advisory including SECURITY-161
Search results page did not correctly encode query parameters.
JENKINS-42390
When validating a cron expression, consider the specified time zone.
JENKINS-43228
Do not display a warning when an SCM trigger has no schedules (either to disable SCM post-commit hooks, or to enable them without polling).
JENKINS-42194
Fix performance issue in deduplication of lists of tool installers.
JENKINS-42141