CVE-2026-49356

LOW

Babel: Arbitrary File Read via sourceMappingURL Comment in @babel/core

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 3.2
EPSS 0.0013
EPSS Percentile 2.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-200 CWE-22
Status published
Products (5)
babel/babel 8.0.0 alpha0 (28 CPE variants)
babel/babel < 7.29.6 (2 CPE variants)
babel/babel >= 8.0.0-alpha.0, < 8.0.0-rc.5
babel/core 0 - 7.29.6npm
babel/core 8.0.0-alpha.0 - 8.0.0-rc.6npm
Published Jun 22, 2026
Tracked Since Jun 22, 2026