Babel-preset-env is a powerful tool that allows developers to use the latest JavaScript features while ensuring compatibility with different browsers and environments. Version 1.5.2 builds upon the solid foundation of version 1.5.1, offering incremental improvements and refinements without introducing breaking changes. A key aspect for developers is the continued support for numerous Babel plugins, encompassing various ES2015 transformations crucial for modern JavaScript development, like class transpilation, destructuring, and module handling, ensuring a smooth transition to newer syntax.
While the core dependencies remain consistent, the update signifies ongoing maintenance and stability improvements. Developers already using version 1.5.1 can confidently upgrade to 1.5.2 to benefit from any bug fixes or minor enhancements made under the hood. The consistency in peer dependencies ensures a seamless upgrade process with minimal risk of compatibility issues within existing project setups.
For new users, both versions offer a robust solution to streamline the Babel configuration process. Instead of manually configuring individual plugins, babel-preset-env intelligently determines the necessary transformations based on the target environment specified through browserlist, saving valuable time and effort. This makes it easier than ever to write modern JavaScript and deploy it across a wide range of platforms, from legacy browsers to the latest node.js versions. This focus on streamlining configurations and ensuring compatibility is central to the package's value propisition.
All the vulnerabilities related to the version 1.5.2 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