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resolvedcritical

Malicious code in yfinancce (PyPI)

Attacker distributed 900+ malicious packages via PyPI, including yfinancce, which installed malicious browser extensions designed to manipulate clipboard contents and replace cryptocurrency wallet addresses.

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Disclosed
Last updated
Blast radius
900+ malicious packages distributed via PyPI
Ecosystems
PyPI
Attack vectors
Compromised package
Affected entities
  • yfinancceTyposquatting variant of legitimate yfinance package

A large-scale malicious package campaign distributed over 900 compromised packages via PyPI. The yfinancce package (a typosquatting variant of the legitimate yfinance library) was among those affected.\n\nThe malicious packages installed browser extensions that performed clipboard manipulation and cryptocurrency wallet address replacement attacks. This technique targets users who copy and paste wallet addresses, replacing them with attacker-controlled addresses to redirect cryptocurrency transfers.\n\nThe campaign was identified and documented by the OpenSSF's malicious-packages repository. The incident has been resolved through package removal from PyPI and public disclosure.

Indicators of compromise

Packages
  • yfinancce

Remediation

  • Remove yfinancce and any other suspicious packages from affected systems
  • Audit installed browser extensions for unauthorized or suspicious entries
  • Review recent cryptocurrency transactions for signs of address manipulation
  • Use the legitimate yfinance package instead of yfinancce
  • Monitor PyPI for similar typosquatting variants of commonly-used packages
  • Implement package verification and integrity checks in dependency management workflows

Sources

  1. GitHub Advisory GHSA-m657-v6m9-xh57 · GitHub Advisory Database

Cite this entry

"Malicious code in yfinancce (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-yfinancce-pypi-1kf1ux

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