CVE-2026-32723
SandboxJS timers have an execution-quota bypass (cross-sandbox currentTicks race)
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.35, SandboxJS timers have an execution-quota bypass. A global tick state (`currentTicks.current`) is shared between sandboxes. Timer string handlers are compiled at execution time using that global tick state rather than the scheduling sandbox's tick object. In multi-tenant / concurrent sandbox scenarios, another sandbox can overwrite `currentTicks.current` between scheduling and execution, causing the timer callback to run under a different sandbox's tick budget and bypass the original sandbox's execution quota/watchdog. Version 0.8.35 fixes this issue.
| CWE | CWE-362 |
| Vendor | nyariv |
| Product | sandboxjs |
| Published | Mar 18, 2026 |
| Last Updated | Mar 19, 2026 |
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