CVE-2026-32723
Description
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.
How to fix
- nyariv sandboxjs0.8.35 or later
- @nyariv/sandboxjs0.8.35 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nyariv sandboxjs | v < 0.8.35 | 0.8.35 |
| @nyariv/sandboxjsnpm | v < 0.8.35 | 0.8.35 |
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Attack Surface Management
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