SandboxJS Prototype Pollution -> Sandbox Escape -> RCE_CVE-2026-25142

10 / 10

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Description

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.27, SanboxJS does not properly restrict __lookupGetter__ which can be used to obtain prototypes, which can be used for escaping the sandbox / remote code execution. This vulnerability is fixed in 0.8.27.

Basic Information

ID CVE-2026-25142

Source GitHub_M

Published Feb 2, 2026 at 22:51

Modified Feb 2, 2026 at 22:52

Affected Product

Vendor nyariv

Product SandboxJS

Version < 0.8.27

Affected Versions nyariv SandboxJS < 0.8.27

CWE Classification

CWE-94

References

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    "published": "2026-02-02T22:51:40.651Z",
    "modified": "2026-02-02T22:52:11.849Z",
    "type": "cve",
    "title": "SandboxJS Prototype Pollution -> Sandbox Escape -> RCE",
    "source": "GitHub_M",
    "references": "https://github.com/nyariv/SandboxJS/security/advisories/GHSA-9p4w-fq8m-2hp7\nhttps://github.com/nyariv/SandboxJS/commit/75c8009db32e6829b0ad92ca13bf458178442bd3\nhttps://github.com/nyariv/SandboxJS/blob/f212a38fb5a6d4bc2bc2e2466c0c011ce8d41072/src/executor.ts#L368-L398",
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