CVE-2023-39332 (node.js)

Various `node:fs` functions allow specifying paths as either strings or `Uint8Array` objects. In Node.js environments, the `Buffer` class extends the `Uint8Array` class. Node.js prevents path traversal through strings (see CVE-2023-30584) and `Buffer` objects (see CVE-2023-32004), but not through non-`Buffer` `Uint8Array` objects.

This is distinct from CVE-2023-32004 ([report 2038134](https://hackerone.com/reports/2038134)), which only referred to `Buffer` objects. However, the vulnerability follows the same pattern using `Uint8Array` instead of `Buffer`.

Impacts:

This vulnerability affects all users using the experimental permission model in Node.js 20. …

buffer class cve environments functions node node.js non path path traversal permission strings vulnerability