Description

Babel is a compiler for writingJavaScript. In `@babel/traverse` prior to versions 7.23.2 and 8.0.0-alpha.4 and all versions of `babel-traverse`, using Babel to compile code that was specifically crafted by an attacker can lead to arbitrary code execution during compilation, when using plugins that rely on the `path.evaluate()`or `path.evaluateTruthy()` internal Babel methods. Known affected plugins are `@babel/plugin-transform-runtime`; `@babel/preset-env` when using its `useBuiltIns` option; and any "polyfill provider" plugin that depends on `@babel/helper-define-polyfill-provider`, such as `babel-plugin-polyfill-corejs3`, `babel-plugin-polyfill-corejs2`, `babel-plugin-polyfill-es-shims`, `babel-plugin-polyfill-regenerator`. No other plugins under the `@babel/` namespace are impacted, but third-party plugins might be. Users that only compile trusted code are not impacted. The vulnerability has been fixed in `@babel/[email protected]` and `@babel/[email protected]`. Those who cannot upgrade `@babel/traverse` and are using one of the affected packages mentioned above should upgrade them to their latest version to avoid triggering the vulnerable code path in affected `@babel/traverse` versions: `@babel/plugin-transform-runtime` v7.23.2, `@babel/preset-env` v7.23.2, `@babel/helper-define-polyfill-provider` v0.4.3, `babel-plugin-polyfill-corejs2` v0.4.6, `babel-plugin-polyfill-corejs3` v0.8.5, `babel-plugin-polyfill-es-shims` v0.10.0, `babel-plugin-polyfill-regenerator` v0.5.3.

Severity CRITICAL

CVSS Score 9.5

CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE CWE-184

Public Exploit ✅ No

Source NVD

Published 2023-10-16

Updated 2026-06-08

Modified 2024-04-04

Fix URL https://github.com/babel/babel/commit/b13376b346946e3f62fc0848c1d2a23223314c82

Software	From version	Fixed in
@babel/traverse	—	—
babel	—	—
babel-helper-define-polyfill-provider	—	0.4.3
babel-plugin-polyfill-corejs2	—	0.4.6
babel-plugin-polyfill-corejs3	—	0.8.5
babel-plugin-polyfill-es-shims	—	0.10.0
babel-plugin-polyfill-regenerator	—	0.5.3
babel-plugin-transform-runtime	—	7.23.2
babel-preset-env	—	7.23.2
babel-traverse	—	—
debian-linux	—	—