# CVE-2023-30583: Node.js 20: Improper Access Control

CVE-2023-30583 is fixed in Node.js 20 on 1 platform by Node.js 20 20.3.1 (version 20.3.1), released June 20, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-30583
- Priority: High
- CVSS: 7.5
- EPSS: 0.0072
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 7, 2024
- Weakness: CWE-284: Improper Access Control
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-30583

## Description

fs.openAsBlob() can bypass the experimental permission model when using the file system read restriction with the `--allow-fs-read` flag in Node.js 20. This flaw arises from a missing check in the `fs.openAsBlob()` API.  Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Node.js 20 | 20.3.1 | [Node.js 20 20.3.1](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.20-20.3.1.md) | Jun 20, 2023 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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