Babel Preset Env simplifies JavaScript development by enabling developers to use the latest ECMAScript features without worrying about browser compatibility. Version 1.2.2 arrives as a refinement of the previous 1.2.1, offering updated dependencies for enhanced stability and feature support. The core functionality remains consistent: intelligently compiling modern JavaScript code into a version compatible across different environments, determined by your specified browser or Node.js versions.
Key improvements in 1.2.2 involve updating many internal Babel plugins, especially those handling ES2015 transformations, bringing them up to the ^6.22.0 or ^6.23.0 range. This includes plugins for arrow functions, block scoping, classes, destructuring, and modules. This ensures that the latest bug fixes and performance improvements from the Babel core team are integrated directly into your build process. Developers will also benefit from updated versions of tools like electron-to-chromium and browserslist which further enhances browser compatibility. Moreover, the bump in devDependencies ensures better tooling for testing and linting. For developers, upgrading to 1.2.2 means a smoother development experience with enhanced ES2015 support and bug fixes inherited from the updated Babel plugins, leading to better code and fewer headaches. While the core API remains unchanged, the internal improvements strengthen the reliability and stability of your Babel pipeline.
All the vulnerabilities related to the version 1.2.2 of the package
Babel vulnerable to arbitrary code execution when compiling specifically crafted malicious code
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@babel/helper-define-polyfill-provider, such as babel-plugin-polyfill-corejs3, babel-plugin-polyfill-corejs2, babel-plugin-polyfill-es-shims, babel-plugin-polyfill-regeneratorNo 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/traverse@7.23.2.
Babel 6 does not receive security fixes anymore (see Babel's security policy), hence there is no patch planned for babel-traverse@6.
@babel/traverse to v7.23.2 or higher. You can do this by deleting it from your package manager's lockfile and re-installing the dependencies. @babel/core >=7.23.2 will automatically pull in a non-vulnerable version.@babel/traverse and are using one of the affected packages mentioned above, 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 v0.4.3babel-plugin-polyfill-corejs2 v0.4.6babel-plugin-polyfill-corejs3 v0.8.5babel-plugin-polyfill-es-shims v0.10.0babel-plugin-polyfill-regenerator v0.5.3