Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nyariv | Sandboxjs | < 0.8.35 |
Related Weaknesses (CWE)
References
- https://github.com/nyariv/SandboxJS/commit/cc8f20b4928afed5478d5ad3d1737ef2dcfaaPatch
- https://github.com/nyariv/SandboxJS/security/advisories/GHSA-7p5m-xrh7-769rExploitVendor Advisory
FAQ
What is CVE-2026-32723?
CVE-2026-32723 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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 h...
How severe is CVE-2026-32723?
CVE-2026-32723 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32723?
Check the references section above for vendor advisories and patch information. Affected products include: Nyariv Sandboxjs.