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resolvedcritical

Malicious code in ai-cypher (PyPI)

The ai-cypher package on PyPI contained malicious code in a compiled native extension that exfiltrates sensitive Telegram files upon import. The package was identified and cataloged by the OpenSSF malicious-packages project.

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Disclosed
Last updated
Blast radius
Unknown; depends on download count and user base of ai-cypher package
Ecosystems
PyPI
Attack vectors
Compromised package
Threat actor
2025 12 AI Cypher
Affected entities
  • ai-cypherPyPI package containing malicious compiled native extension

The ai-cypher package distributed via PyPI contained malicious code hidden within a compiled native extension. Upon import, the extension exfiltrates sensitive files related to Telegram, indicating credential theft or information stealing intent.

The malicious package was identified and attributed to campaign 2025-12-ai-cypher by the OpenSSF's malicious-packages project. The attack vector involved distributing the compromised package directly on PyPI, where it could be installed by unsuspecting users.

The incident was disclosed on 2026-07-21 and cataloged under OpenSSF's malicious package tracking (MAL-2025-192683). Users who installed affected versions of ai-cypher should assume their Telegram-related files and credentials may have been compromised.

Indicators of compromise

Packages
  • ai-cypher

Remediation

  • Immediately uninstall ai-cypher from all systems
  • Audit systems for unauthorized access or data exfiltration related to Telegram
  • Review Telegram account security and change credentials if necessary
  • Check for any suspicious activity in Telegram accounts
  • Use dependency scanning tools to detect if ai-cypher was installed in your supply chain
  • Review PyPI package dependencies to ensure no other malicious packages are present

Sources

  1. GitHub Advisory GHSA-4p6r-67hj-p2w3 · GitHub Advisory Database

Cite this entry

"Malicious code in ai-cypher (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-ai-cypher-pypi-10vm8i

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