The maintainers of the Python Package Index (PyPI) repository briefly suspended new user sign-ups following an influx of malicious projects uploaded as part of a typosquatting campaign.

It said “new project creation and new user registration” was temporarily halted to mitigate what it said was a “malware upload campaign.” The incident was resolved 10 hours later, on March 28, 2024, at 12:56 p.m. UTC.

Software supply chain security firm Checkmarx said the unidentified threat actors behind flooding the repository targeted developers with typosquatted versions of popular packages.