---
id: "GHSA-p3hm-x653-5rc6"
kind: "vulnerability"
aliases: ["GHSA-p3hm-x653-5rc6"]
title: "Duplicate Advisory: ip-address: Address6 matches a zone identifier in quadratic time ahead of its length limit, allowing a single long string to stall the process"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "withdrawn"
category: "package"
products: [{"name": "ip-address", "fixed": [], "affected": "<= 10.7.3", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["cwe-1333", "ip-address", "node.js", "npm", "package"]
not_affected_if: ["ip-address-not-installed", "no-untrusted-input-to-address6"]
published_at: "2026-10-18T03:32:37+00:00"
first_seen_at: "2026-10-23T19:11:31+00:00"
updated_at: "2026-10-23T20:15:39+00:00"
sources: [{"source": "ghsa", "url": "https://github.com/advisories/GHSA-p3hm-x653-5rc6", "first_seen_at": "2026-10-23T19:11:31+00:00"}]
---

# Duplicate Advisory: ip-address: Address6 matches a zone identifier in quadratic time ahead of its length limit, allowing a single long string to stall the process

The npm package ip-address has a regex in its Address6 parsing that runs in quadratic time on zone identifiers, so one long input with many % characters can stall the Node.js process. An attacker who can reach a code path that passes untrusted text into Address6 can cause CPU exhaustion and application stall.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- npm:ip-address affected <= 10.7.3 fixed ?

## How to check

Run npm ls ip-address to see which versions are installed, including transitive copies.
Flag any version at or below 10.7.3 as affected.

## Fix

Upgrade ip-address to 10.7.4 or later, per the original description; the withdrawn advisory itself names no fixed version.
The duplicate GHSA-rxp7-6hxx-x8q5 is the live advisory to follow.

## Timeline

- 2026-10-23T19:11:31+00:00 ghsa https://github.com/advisories/GHSA-p3hm-x653-5rc6

## From the sources

## Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-rxp7-6hxx-x8q5. This link is maintained to preserve external references.

## Original Description
ip-address before 10.7.4 allows a denial of service (CPU consumption from quadratic complexity, and application stall) via many % characters in input reaching a function call that uses the Address6 constructor.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_