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Vulnerability details

3.2/10
CVSS 3.1
GHSA-4x5r-pxfx-6jf8
in_triage Published 2026-06-15 Updated 2026-07-15
GitHub Advisory
Vulnerability Data from Dependency-Track
Affected versions
Score
3.2 CVSS 3.1 GITHUB CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
Description
## 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/core@7.29.6` and `@babel/core@8.0.0-rc.6`. ## Workarounds Callers can mitigate the issue without upgrading by setting [`inputSourceMap: false`](https://babeljs.io/docs/options#inputsourcemap) 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.
Same vulnerability as
CVE-2026-49356 in_triage according to EUVD-2026-38302
Analysis Read only
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