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CVE PROGRAM SOURCE RECORD3.2 Low

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

babel babel

  • >= 8.0.0-alpha.0, < 8.0.0-rc.5affected
  • < 7.29.6affected

References