A flaw was found in nodejs-netmask. Octal input data may lead to a server-side request forgery, remote file inclusion, local file inclusion, and other vulnerabilities. The highest threat from this vulnerability is to data integrity.

Node.js netmask module could allow a remote attacker to bypass security restrictions, caused by improper handling of certain unexpected characters in an IP address string. By using a specially-crafted argument using octal literals, an attacker could exploit this vulnerability to bypass access control that is based on IP addresses.