VYPR

pypi · Malicious package advisory

Malware

pycacheopt

MAL-2026-3371

Malicious code in pycacheopt (PyPI)

Details


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## Source: kam193 (cf50eae305079227b5283e08547cc201f941624c95e49460c3e6544cdd1e221b)
The extension module hides code that in specific circumstances executes given code. The malicious action is hidden only in the extension module with the same-named Python code file containing only benign code.

This campaign was first detected by Aikido Security.


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


Campaign: 2026-05-pycacheopt


Reasons (based on the campaign):


 - other


 - The package contains code to detect if it is running in a sandbox environment.

Compromised versions (7)

  • 0.2.1
  • 0.2.2
  • 0.2.3
  • 0.2.4
  • 0.2.5
  • 0.2.6
  • 0.2.7

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.