Hardening Jenkins After the September 2026 Plugin Advisory: A Practical Guide The Jenkins advisory of September 16, 2026 covers 20 plugin vulnerabilities, seven of which break the Script Security sandbox and yield code execution on the controller. The patches are available. What follows is the operational work around them: how to apply the fixes, how to tell whether you were affected, and which configuration changes reduce the impact of the next advisory. Step one: identify what ...