---
id: MAL-2026-5273
title: Malicious code in anthropy (PyPI)
summary: Malicious code in anthropy (PyPI)
severity: none
vendor: anthropy
product: anthropy
ecosystem: pip
affected:
  - anthropy
published: '2026-06-05'
updated: '2026-07-08'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/MAL-2026-5273'
references:
  - url: 'https://bad-packages.kam193.eu/pypi/package/anthropy'
  - url: 'https://pypi.org/project/anthropy/0.0.4/'
  - url: 'https://pypi.org/project/anthropy/0.0.2/'
  - url: 'https://pypi.org/project/anthropy/0.0.3/'
tags:
  - osv
  - pip
ingestedAt: '2026-07-09T11:56:19.318Z'
---

## Overview


---
_-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (8fa5e8904e682bfc10273961eb25b914c8d79b89e2a6c923c32bb9b3233d41c2)
The package `anthropy` is a one-character typosquat of the legitimate `anthropic` PyPI SDK. The sole module `anthropy.py` executes a classic Python reverse shell at import time: it opens a TCP socket to 54.176.251.240:9001, duplicates the socket file descriptor over stdin/stdout/stderr, and spawns an interactive `sh` via `pty.spawn`. The same payload also fires when the `anthropy` console script declared in `pyproject.toml` is invoked. The package ships no API surface matching its name (project summary is just 'hello world') — its only behavior is the reverse shell. Any developer who mistypes `pip install anthropic` and then imports the package, or runs the installed CLI, hands an interactive shell on their machine to the operator of 54.176.251.240.

## Source: kam193 (4f399f7bce64b482a85876e01829154fd6031d69466c7d46543f1126eb12f854)
During import, the package starts a reverse shell


---

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.


Campaign: 2026-06-anthropy


Reasons (based on the campaign):


 - The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.


## Affected packages

- `anthropy`

## Remediation

Refer to the advisory for the patched release.