@babel/runtime version 7.25.0 represents the latest iteration of Babel's modular runtime helpers, released on July 26, 2024. Focusing on developer benefits, this update refines the underlying support for modern JavaScript features, ensuring seamless integration with Babel-compiled code. Compared to the previous stable version, 7.24.8 (released on July 11, 2024), version 7.25.0 delivers improvements that contributes to optimised execution of transformed code, which is crucial for large-scale applications and performance-sensitive environments.
While both versions maintain the same core functionality and dependency on regenerator-runtime, version 7.25.0 includes a few more files. The unpacked size has increased by a small margin as well which might indicate that there are bug fixes that target specific edge cases, or further refinements to existing helper functions. Developers relying on @babel/runtime benefit from enhanced compatibility and greater stability when targeting diverse JavaScript environments. The library, licensed under MIT, continues to offer a valuable suite of tools essential for bridging the gap between bleeding-edge JavaScript syntax and older browser implementations. This latest update reinforces its commitment to providing robust and efficient runtime support, as it makes sure that the latest JavaScript code is compiled correctly and runs as intended.
All the vulnerabilities related to the version 7.25.0 of the package
Babel has inefficient RegExp complexity in generated code with .replace when transpiling named capturing groups
When using Babel to compile regular expression named capturing groups, Babel will generate a polyfill for the .replace method that has quadratic complexity on some specific replacement pattern strings (i.e. the second argument passed to .replace).
Your generated code is vulnerable if all the following conditions are true:
.replace method on a regular expression that contains named capturing groups.replaceIf you are using @babel/preset-env with the targets option, the transform that injects the vulnerable code is automatically enabled if:
You can verify what transforms @babel/preset-env is using by enabling the debug option.
This problem has been fixed in @babel/helpers and @babel/runtime 7.26.10 and 8.0.0-alpha.17, please upgrade. It's likely that you do not directly depend on @babel/helpers, and instead you depend on @babel/core (which itself depends on @babel/helpers). Upgrading to @babel/core 7.26.10 is not required, but it guarantees that you are on a new enough @babel/helpers version.
Please note that just updating your Babel dependencies is not enough: you will also need to re-compile your code.
If you are passing user-provided strings as the second argument of .replace on regular expressions that contain named capturing groups, validate the input and make sure it does not contain the substring $< if it's then not followed by > (possibly with other characters in between).
This vulnerability was reported and fixed in https://github.com/babel/babel/pull/17173.