SB2026091632 - Path traversal in babel

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Main Vulnerability Database SB2026091632

SB2026091632 - Path traversal in babel

Published: September 16, 2026

Security Bulletin ID SB2026091632
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Path traversal (CVE-ID: CVE-2026-49356)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to read arbitrary source maps from the system running Babel.

The vulnerability exists due to improper limitation of a pathname to a restricted directory in @babel/core's sourceMappingURL comment handling when compiling attacker-controlled source code. A remote attacker can supply crafted source code containing a sourceMappingURL comment to read a source map at a known path.

Exploitation requires the ability to read the compiled output and knowledge of the target source map's path.


Remediation

Install update from vendor's website.

References