MAL-2026-3403 Malicious code in textwrap-formatter (PyPI)
- Package
- textwrap-formatter
- Registry
- PyPI
What is MAL-2026-3403?
MAL-2026-3403 is a malicious package in textwrap-formatter, published on 9 May 2026.
Official description
During installation, obfuscated code exfiltrates cryptocurrency wallet data to a hardcoded location and places a backdoor through a new authorized SSH key. Information about the placed backdoor is sent back to the attacker, and sshd configuration is adjusted to ensure the successful remote connection.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-05-ninja-core-utils
Reasons (based on the campaign):
The package overrides the install command in setup.py to execute malicious code during installation.
obfuscation
crypto-related
exfiltration-crypto
backdoor
What should I do about MAL-2026-3403?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.