Skip to content
supplychainattack.orgSupply chain attack incident catalog
resolvedcritical

Malicious code in yfinace (PyPI)

Attacker distributed 900+ malicious packages via PyPI, including yfinace, which infected local browsers with malicious extensions designed to manipulate clipboard and replace cryptocurrency wallet addresses.

ShareXLinkedInHacker News
Disclosed
Last updated
Blast radius
900+ malicious packages distributed via PyPI
Ecosystems
PyPI
Attack vectors
Compromised package
Affected entities
  • yfinaceMalicious package distributed via PyPI

A large-scale malicious package campaign was discovered on PyPI involving over 900 compromised or malicious packages. The yfinace package was among those identified as containing malicious code.\n\nThe malicious packages were designed to install browser extensions that would manipulate users' clipboards and replace cryptocurrency wallet addresses, enabling theft of cryptocurrency transactions.\n\nThe incident was documented by Checkmarx and credited to the OpenSSF's malicious-packages repository, which tracks known malicious packages across package ecosystems.\n\nThis represents a significant supply chain attack affecting PyPI users who installed any of the 900+ malicious packages during the distribution period.

Indicators of compromise

Packages
  • yfinace

Remediation

  • Identify and remove the yfinace package and any other packages from the 900+ malicious package list from affected systems
  • Audit browser extensions for suspicious or unauthorized installations
  • Review clipboard history and cryptocurrency wallet transaction records for signs of manipulation
  • Update to clean versions of legitimate packages if available
  • Monitor cryptocurrency wallet addresses for unauthorized transactions
  • Implement package verification and integrity checks in dependency management workflows

Sources

  1. GitHub Advisory GHSA-7p76-wm85-5m69 · GitHub Advisory Database

Cite this entry

"Malicious code in yfinace (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-yfinace-pypi-15jz3w

Suggest a correction

Found an error or have a newer source? Corrections to factual errors take priority over new entries.

Related incidents

  1. resolvedcritical

    Malicious code in afrit-name (PyPI)

    Malicious code was discovered in the afrit-name package on PyPI. The incident was identified and documented by the OpenSSF malicious packages project.

    PyPICompromised package
  2. resolvedcritical

    Malicious code in adv2099m7 (PyPI)

    Malicious code was discovered in the adv2099m7 package on PyPI. The package was identified and cataloged by the OpenSSF malicious packages project.

    PyPICompromised package
  3. resolvedcritical

    Malicious code in adrandom (PyPI)

    The adrandom package on PyPI contained malicious code that executed spyware and information-stealing malware. It was part of a campaign by the EsqueleSquad group that published nearly 6,000 malicious packages across PyPI and NPM.

    EsquelesquadPyPICompromised package
  4. resolvedcritical

    Malicious code in ziphash (PyPI)

    The ziphash package on PyPI contained malicious code that downloads and executes multi-stage malware during archive-support class initialization. The malware exhibits obfuscation and remote code execution capabilities, classified as part of the 2025-11-uzip campaign.

    2025 11 UzipPyPICompromised package