ServiceNow phases out Server-Side Sandbox: guarded Scripts / Kittyscript / Server-Side Sandbox Runtime update
ServiceNow phases out Server-Side Sandbox ServiceNow is replacing the server-side JavaScript sandbox with a locked-down runtime called Guarded Script (internal name KittyScript, abbreviated ks in property names). It restricts what code can run in sandbox contexts. SN KB in the thread. see https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB2944435 easy solution: move filter logic into script includes cloud instances only will get exemptions auto created - won't happen for on-prem ------ 5/29/26, 12:17 PM Server-Side Sandbox Runtime Replacement - Support and Troubleshooting 9+ S MyNow Products Industries KB2944435 Learning Server-Side Sandbox Runtime Replacement Support 14041 Views Last updated : May 22, 2026 Customer Copy Permalink Subscribe English (Original) Partners Company KB Summary by Now Assist Summarize Quick Summary What you need to know: ServiceNow is enhancing instance security by restricting the type of code that can ru...