CVE-2023-39333: Node.js Node

Medium severity, CVSS 5.3. EPSS: 0.9% chance of exploitation in the next 30 days.

Maliciously crafted export names in an imported WebAssembly module can inject JavaScript code. The injected code may be able to access data and functions that the WebAssembly module itself does not have access to, similar to as if the WebAssembly module was a JavaScript module. This vulnerability affects users of any active release line of Node.js. The vulnerable feature is only available if Node.js is started with the `--experimental-wasm-modules` command line option.

Affected products

• Node.js Node: from 4.0, before 5 (fixed in 5); from 5.0, before 6 (fixed in 6); from 6.0, before 7 (fixed in 7); from 7.0, before 8 (fixed in 8); from 8.0, before 9 (fixed in 9); from 9.0, before 10 (fixed in 10); …
• Node.js Node.js: from 18.0, before 18.18.2 (fixed in 18.18.2); from 20.0, before 20.8.1 (fixed in 20.8.1)

Published 2024-09-07. Last modified 2026-06-17.