---
id: CVE-2026-69198
title: >-
  ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses
  in JavaScript
summary: >-
  ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses
  in JavaScript. From 10.1.1 until 10.2.2, every special-use classification
  method is built on isInSubnet, which short-circuits to false whenever the
  address's ow…
severity: medium
cwe:
  - CWE-20
  - CWE-918
vendor: ip-address
product: ip-address
affected:
  - 'ip-address >= 10.1.1, <= 10.2.1'
patched:
  - ip-address 10.2.2
published: '2026-08-03'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T20:30:11.423'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69198'
references:
  - url: >-
      https://github.com/beaugunderson/ip-address/commit/488fe9bc7c35363b4b090494fc38c266d217740d
    label: security-advisories@github.com
  - url: 'https://github.com/beaugunderson/ip-address/releases/tag/v10.2.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/beaugunderson/ip-address/security/advisories/GHSA-4xrf-jv44-h6hh
    label: security-advisories@github.com
  - url: >-
      https://github.com/beaugunderson/ip-address/security/advisories/GHSA-4xrf-jv44-h6hh
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-4xrf-jv44-h6hh'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.0048
epssPercentile: 0.38737
aliases:
  - GHSA-4xrf-jv44-h6hh
ecosystem: npm
ingestedAt: '2026-08-03T20:29:32.388Z'
---

## Overview

ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. From 10.1.1 until 10.2.2, every special-use classification method is built on isInSubnet, which short-circuits to false whenever the address's own subnet mask is shorter than the reference range's mask. That mask comes verbatim from the CIDR suffix on the parsed input, so appending a suffix such as /0 suppresses classification entirely: isLoopback(), isPrivate(), isLinkLocal(), isCGNAT(), isMulticast(), isUnspecified(), isBroadcast(), isULA(), and getType() all report an internal address as unremarkable, while correctForm() and address still return the real internal target. An application that builds a network trust-boundary decision on these checks, for example a filter intended to block Server-Side Request Forgery, or SSRF, may therefore treat an internal target as external and allow the request. The underlying bit comparison is correct, and mask(n) already returns the first n bits of the full parsed address independently of subnetMask; the defect is solely that the containment guard sits in the classification path. This issue is fixed in version 10.2.2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-69198)

Affected packages:

- `ip-address >= 10.1.1, <= 10.2.1`

Patched in:

- `ip-address 10.2.2`

Source: https://github.com/advisories/GHSA-4xrf-jv44-h6hh