What is CVE-2026-32723?

CVE-2026-32723 is a medium-severity vulnerability in Nyariv Sandboxjs, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.7/10. Published 2026-03-18.

How severe is CVE-2026-32723?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Nyariv Sandboxjs

CVE-2026-32723

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…

Vulnerability class: Race Condition

EPSS: 0.001 (4.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Nyariv Sandboxjs — versions < 0.8.35

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-32723?: CVE-2026-32723 is a medium-severity vulnerability in Nyariv Sandboxjs, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.7/10. Published 2026-03-18.
How severe is CVE-2026-32723?: Medium severity. CVSS v3 base score is 4.7 out of 10.