CVE-2023-30583

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-07 · updated 2026-06-17
Weakness: CWE-284

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.

Affected products

nodejs: from 20.0 before 20.3.1 — fixed in 20.3.1

How to fix

Upgrade to a fixed version: nodejs 20.3.1. Check the vendor advisory for mitigations.

References

https://nodejs.org/en/blog/vulnerability/june-2023-security-releases
https://security.netapp.com/advisory/ntap-20240926-0006/

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