Babel preset stage 2 version 6.22.0 represents an incremental update over the previous stable version 6.18.0, focusing on dependency enhancements. For developers utilizing this preset, the key takeaway is the synchronized version bumps across its dependencies. Specifically, babel-preset-stage-3, babel-plugin-transform-decorators, and babel-plugin-transform-class-properties have all been updated to version 6.22.0. This ensures compatibility and access to the latest features and bug fixes within those respective components. While babel-plugin-syntax-dynamic-import remains unchanged at version 6.18.0, the other updates provide access to newer ECMAScript proposals moving through the stages.
The upgrade to babel-preset-stage-3 inherently includes any refinements and features added to that preset, likely bringing in more refined syntax transformations for newer Javascript features closer to standardization. Similarly, updated versions of babel-plugin-transform-decorators and babel-plugin-transform-class-properties allows you to use the most recent decorators and class properties specifications accepted at the point of their release. Developers should consult the changelogs for these individual packages to fully understand the detailed changes and potential breaking changes they introduce.
The update, released in January 2017, arrives a few months after v6.18.0, which was created in October 2016, reflecting ongoing efforts to keep the preset aligned with the evolving landscape of JavaScript standards and provides a more stable and feature-rich experience when working with stage 2 features.
All the vulnerabilities related to the version 6.22.0 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