---
title: "Typosquatting"
description: "Typosquatting is publishing a malicious package with a name almost identical to a popular one, to catch mistyped or misremembered installs. A single swapped…"
canonical_url: "https://cloudsmith.com/resources/glossary/typosquatting"
last_updated: "2026-10-16T14:52:08Z"
---
# Typosquatting

## What Is Typosquatting?

Typosquatting is publishing a malicious package with a name almost identical to a popular one, to catch mistyped or misremembered installs. A single swapped letter can be enough to run an attacker's code.

## Common Typosquatting Techniques

Attackers use a handful of patterns:

- Swapped, missing or doubled characters
- Hyphen and underscore variations
- Look-alike names that add words such as "js" or "official"
- Names in a different namespace or scope

Each relies on speed and familiarity beating careful reading.

## Why Typosquatting Matters

Public registries accept new packages quickly, and installs can run code immediately. The malicious package often copies the real one and adds a payload that steals credentials or opens a backdoor. AI coding assistants that suggest package names can also introduce near-miss names.

## How to Reduce Typosquatting Risk

- Install only from an approved, controlled registry
- Review new dependencies in pull requests
- Scan packages for malware before use
- Hold very new or low-reputation packages

## Final Thought

Typosquatting exploits human habit, so the defense should not depend on human attention alone.

## Frequently asked questions

### Is typosquatting illegal?

Publishing malware is illegal in most jurisdictions, and registries remove such packages when they find them.

### How is typosquatting different from dependency confusion?

Typosquatting depends on a mistyped name. Dependency confusion depends on a correct internal name resolving to a public package.

### Can scanners detect typosquatted packages?

Often, through name similarity checks and malware analysis, but detection is not guaranteed for new packages.

### Does typosquatting only affect npm?

No. It has been seen on PyPI, RubyGems, NuGet and other registries.