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CVE-2026-32723— SandboxJS timers have an execution-quota bypass (cross-sandbox currentTicks race)

Quick assessment

Affected
nyariv SandboxJS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SandboxJS是nyariv个人开发者的一个安全评估软件。 SandboxJS 0.8.35之前版本存在竞争条件问题漏洞，该漏洞源于计时器存在执行配额绕过问题，可能导致多租户场景中计时器回调在不同沙箱的滴答预算下运行，绕过原始沙箱的执行配额。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.12% · P2
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I. Basic Information for CVE-2026-32723

Vulnerability Information
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Vulnerability Title
SandboxJS timers have an execution-quota bypass (cross-sandbox currentTicks race)
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
SandboxJS 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SandboxJS是nyariv个人开发者的一个安全评估软件。 SandboxJS 0.8.35之前版本存在竞争条件问题漏洞，该漏洞源于计时器存在执行配额绕过问题，可能导致多租户场景中计时器回调在不同沙箱的滴答预算下运行，绕过原始沙箱的执行配额。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nyariv SandboxJS < 0.8.35 -

II. Public POCs for CVE-2026-32723

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III. Intelligence Information for CVE-2026-32723

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Patches & Fixes for CVE-2026-32723 (1)

Vendor Advisories for CVE-2026-32723 (1)

IV. Related Vulnerabilities

Same product: SandboxJS
Same vendor: nyariv
Same weakness: CWE-362

V. Comments for CVE-2026-32723

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