Babel is a compiler for writingJavaScript. In @babel/traverse
prior to versions 7.23.2 and 8.0.0-alpha.4 and all versions of babel-traverse
, 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; and any "polyfill provider" plugin that depends on @babel/helper-define-polyfill-provider
, such as babel-plugin-polyfill-corejs3
, babel-plugin-polyfill-corejs2
, babel-plugin-polyfill-es-shims
, babel-plugin-polyfill-regenerator
. No 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
and @babel/traverse@8.0.0-alpha.4
. Those who cannot upgrade @babel/traverse
and are using one of the affected packages mentioned above should 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
v0.4.3, babel-plugin-polyfill-corejs2
v0.4.6, babel-plugin-polyfill-corejs3
v0.8.5, babel-plugin-polyfill-es-shims
v0.10.0, babel-plugin-polyfill-regenerator
v0.5.3.