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Vulnerability record · CVE-2026-49356 · published 22 June 2026

CVE-2026-49356: Babel path traversal vulnerability

Babel · Babel

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.

3.6 CVSS 3.1 Low EPSS 0.15% · top 96.3% CWE-22 · Path traversalCWE-200 · Information exposure
3.6CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
26 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/babel/babel/security/advisories/GHSA-4x5r-pxfx-6jf8 MitigationVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-49356), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.