CVE-2026-25881
CriticalSummary
SandboxJS to biblioteka do sandboxingu JavaScript. W wersjach przed 0.8.31 występuje podatność na ucieczkę z sandboxa, która pozwala na modyfikację wbudowanych prototypów hosta przez manipulację flagą ochrony isGlobal za pomocą pośrednich literałów tablicowych.
Risk Assessment
Podatność ta prowadzi do trwałego zanieczyszczenia prototypów po stronie hosta, co może umożliwić zdalne wykonanie kodu w aplikacjach korzystających z zanieczyszczonych właściwości w wrażliwych miejscach.
Recommendation
Zaleca się aktualizację do wersji 0.8.31 lub nowszej, aby usunąć tę podatność.
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Original NVD description (English source)
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.31, a sandbox escape vulnerability allows sandboxed code to mutate host built-in prototypes by laundering the isGlobal protection flag through array literal intermediaries. When a global prototype reference (e.g., Map.prototype, Set.prototype) is placed into an array and retrieved, the isGlobal taint is stripped, permitting direct prototype mutation from within the sandbox. This results in persistent host-side prototype pollution and may enable RCE in applications that use polluted properties in sensitive sinks (example gadget: execSync(obj.cmd)). This vulnerability is fixed in 0.8.31.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS