netmask (npm)

Parse and lookup IP network blocks

Advisories

Latest version

2.1.1

Released Apr 8, 2026

License

MIT

OpenSSF Scorecard

4.1 / 10

How to fix

Upgrading to 2.0.1 or later clears every advisory below that has a fix.

Upgrade commands

npm

npm install netmask@2.1.1

yarn

yarn add netmask@2.1.1

pnpm

pnpm add netmask@2.1.1

Known vulnerabilities

Advisory	Severity	Affected	Fixed in
GHSA-4c7m-wxvm-r7gc Improper parsing of octal bytes in netmask	Critical EPSS 15.04%	`< 1.1.0`	`1.1.0`
GHSA-4c7m-wxvm-r7gc Improper parsing of octal bytes in netmask	Critical EPSS 15.04%	`< 2.0.1`	`2.0.1`

Source: git://github.com/rs/node-netmask.git

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