GHSA-4x5r-pxfx-6jf8 @babel/core: Arbitrary File Read via sourceMappingURL Comment

• npm @babel/core: >= 8.0.0-alpha.0, < 8.0.0-rc.6 → fixed in 8.0.0-rc.6 • npm @babel/core: < 7.29.6 → fixed in 7.29.6

Impact Using `@babel/core` to compile maliciously crafted code can allow ab attacker to read any source map from the system that is running Babel, if these conditions are _all_ true: • the attacker controls the input source code • the attacker can read the output source code • the attacker knows the path of the source map file that they want to read Users that only compile trusted code are not impacted. Patches The vulnerability has been fixed in `@babel/[email protected]` and `@babel/[email protected]`. Workarounds Callers can mitigate the issue without upgrading by setting `inputSourceMap: false` in their Babel options. Callers can also manually extract the `#sourceMappingURL` comment from the input source code, validate whether the source map that it links to is allowed to be read, and if it is pass an object to `inputSourceMap` (passing `false` when it's not). Credits Thanks Teodor-Cristian Radoi for reporting the vulnerability.