CVE-2023-39332: Fedoraproject Fedora

Critical severity, CVSS 9.8. EPSS: 1.8% chance of exploitation in the next 30 days.

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 which only referred to `Buffer` objects. However, the vulnerability follows the same pattern using `Uint8Array` instead of `Buffer`. Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.

Affected products

• Fedoraproject Fedora: version 39 only
• Node.js Node.js: from 20.0.0, before 20.8.0 (fixed in 20.8.0)

Published 2023-10-18. Last modified 2026-06-17.