@babel/runtime, a crucial package for Babel users, provides modular runtime helpers essential for running transformed code. A key dependency of both versions 7.11.2 and 7.11.1 is regenerator-runtime, ensuring proper execution of async/await functions. Developers leveraging Babel will find consistent support as both versions depend on the same version of regenerator-runtime: "^0.13.4". Additionally, both relies on "@babel/helpers":"^7.10.4"
The differences between version 7.11.2 and 7.11.1 of @babel/runtime appear incremental. Both versions have the same number of files (165) and the same unpacked size (99814 bytes), suggesting that no new helpers were added or significant changes introduced in code size. The primary difference lies in the release date. Version 7.11.2 was released on August 5, 2020, while version 7.11.1 was released on August 4, 2020. This one-day gap suggests that 7.11.2 likely contains small bug fixes or very minor improvements over 7.11.1, without impacting the overall package structure or API. For most developers, upgrading from 7.11.1 to 7.11.2 is recommended to benefit from the latest possible fixes, though the impact is probably negligible. Both versions share the same development dependencies, MIT license, and repository details, ensuring continuous support and stability provided by the Babel team. Sebastian McKenzie remains the author of both.
All the vulnerabilities related to the version 7.11.2 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.