CVE-2026-25586
CriticalSummary
SandboxJS to biblioteka do sandboxingu JavaScript. Przed wersją 0.8.29 istniała możliwość ucieczki z sandboxa poprzez nadpisanie metody hasOwnProperty na obiekcie sandboxowym, co dezaktywowało egzekwowanie białej listy prototypów w ścieżce dostępu do właściwości.
Risk Assessment
To pozwala na bezpośredni dostęp do __proto__ oraz innych zablokowanych właściwości prototypu, co może prowadzić do zanieczyszczenia Object.prototype i trwałego wpływu między sandboxami.
Recommendation
Zaleca się aktualizację do wersji 0.8.29 lub nowszej, aby usunąć tę podatność.
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Original NVD description (English source)
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, a sandbox escape is possible by shadowing hasOwnProperty on a sandbox object, which disables prototype whitelist enforcement in the property-access path. This permits direct access to __proto__ and other blocked prototype properties, enabling host Object.prototype pollution and persistent cross-sandbox impact. This vulnerability is fixed in 0.8.29.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS