CVE-2026-49356
Babel: Arbitrary File Read via sourceMappingURL Comment in @babel/core
Description
Babel is a compiler for writing next generation JavaScript. Prior to 8.0.0-rc.6 and 7.29.6, @babel/core affected by an arbitrary file read via a sourceMappingURL comment. Using @babel/core to compile maliciously crafted code can allow an attacker to read any source map from the system that is running Babel, if the attacker controls the input source code, can read the output source code, and knows the path of the source map file that they want to read. This vulnerability is fixed in 8.0.0-rc.6 and 7.29.6.
INFO
Published Date :
June 22, 2026, 4:07 p.m.
Last Modified :
June 22, 2026, 4:07 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-49356
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update @babel/core to 8.0.0-rc.6 or 7.29.6.
- Ensure source map files are protected.
- Review input source code for malicious content.
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CVE-2026-49356 vulnerability anywhere in the article.