CVE-2026-49356
Babel: Arbitrary File Read via sourceMappingURL Comment in @babel/core
CVSS Score
3.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 CWE-200 |
| Vendor | babel |
| Product | babel |
| Published | Jun 22, 2026 |
| Last Updated | Jun 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
babel / babel
>= 8.0.0-alpha.0, < 8.0.0-rc.5 < 7.29.6