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resolvedcritical

Malicious code in yfinannce (PyPI)

Attacker distributed 900+ malicious packages via PyPI, including yfinannce, 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
  • yfinannceTyposquatting variant of yfinance

An attacker distributed over 900 malicious packages via PyPI as part of a coordinated campaign. The yfinannce package (a typosquatting variant of the legitimate yfinance library) was among the malicious packages identified.

The malicious packages installed browser extensions that performed clipboard manipulation and cryptocurrency wallet address replacement attacks. This allowed attackers to intercept and modify cryptocurrency transactions by replacing legitimate wallet addresses with attacker-controlled addresses when users copied and pasted them.

The campaign was identified and documented by Checkmarx, with credit to the OpenSSF's malicious-packages repository for tracking and cataloging the incident. The packages have since been removed from PyPI.

Indicators of compromise

Packages
  • yfinannce

Remediation

  • Remove yfinannce and any other suspicious packages from affected systems
  • Audit installed packages for typosquatting variants and unknown dependencies
  • Review browser extensions for unauthorized or suspicious installations
  • Use the legitimate yfinance package instead of yfinannce
  • Monitor cryptocurrency wallet transactions for unauthorized address changes
  • Implement package verification and allowlisting in dependency management

Sources

  1. GitHub Advisory GHSA-ffwr-gwrj-xg24 · GitHub Advisory Database

Cite this entry

"Malicious code in yfinannce (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-yfinannce-pypi-1cq7t8

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