MAL-2026-3699 Malicious code in aiohttp-util (PyPI)
- Package
- aiohttp-util
- Registry
- PyPI
What is MAL-2026-3699?
MAL-2026-3699 is a malicious package in aiohttp-util, published on 13 May 2026.
Official description
During installation, package exfiltrates some basic info to a GitHub issue comment, and then attempt to set up a persistent infostealer focused on exfiltrating crypto wallets and browsers data. Likely continuation of 2026-05-py-requests
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2025-06-alembic-util
Reasons (based on the campaign):
infostealer
The package overrides the install command in setup.py to execute malicious code during installation.
crypto-related
Downloads and executes a remote malicious script.
exfiltration-browser-data
exfiltration-crypto
persistence
typosquatting
What should I do about MAL-2026-3699?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.