@babel/runtime version 7.10.0 represents a minor update to Babel's runtime helpers, building upon the foundation established by version 7.9.6. Both versions provide essential modular runtime functions required by code transformed by Babel, ensuring compatibility across diverse JavaScript environments. A key dependency remains regenerator-runtime, signifying continued support for async/await functionality and generator functions.
The primary distinction lies in the updated @babel/helpers dev dependency. Version 7.10.0 relies on @babel/helpers version 7.10.0 while the former version relies on version 7.9.6, This indicates that the build process and helper functions used to create the runtime library itself have been refined. The updated devDependencies suggests internal improvements and bug fixes related to the process of compiling code utilizing Babel. Developers using @babel/runtime rarely interact directly with @babel/helpers; however, its update hints at a more robust and potentially optimized runtime environment. The unpackedSize changes slightly from 99023 in version 7.9.6 to 99840 in 7.10.0, along with a minor change in fileCount: increasing from 164 to 165.
For developers already using @babel/runtime, upgrading to 7.10.0 is recommended to benefit from the latest improvements in tooling and code generation. While the core functionality of the runtime remains consistent, staying current usually provides subtle but valuable performance gains and bug fixes, ensuring smooth execution of transformed code. The release date of 2020-05-26 suggests that this version is a mature and well-tested update.
All the vulnerabilities related to the version 7.10.0 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.