[email protected] package deep dependents on vulnerable version of [email protected] package.

from https://nodesecurity.io/advisories/786

Overview
Versions of braces prior to 2.3.1 are vulnerable to Regular Expression Denial of Service (ReDoS). Untrusted input may cause catastrophic backtracking while matching regular expressions. This can cause the application to be unresponsive leading to Denial of Service.
Remediation
Upgrade to version 2.3.1 or higher.
Resources
GitHub Commit

yarn audit v1.13.0
low : Regular Expression Denial of Service
Package : braces
Patched in : >=2.3.1
Dependency of : express-reload
Path : express-reload > chokidar > anymatch > micromatch > braces
More info : https://nodesecurity.io/advisories/786
1 vulnerabilities found -
Severity: 1 Low