Skip to content
supplychainattack.orgSupply chain attack incident catalog
resolvedcritical

Malicious code in yvper (PyPI)

Attacker distributed 900+ malicious packages via PyPI, including yvper, 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
  • yvperPyPI package containing malicious code

A malicious package campaign distributed over 900 compromised packages via PyPI, with yvper being one of the affected packages. The malicious code installed browser extensions that performed clipboard manipulation and cryptocurrency wallet address replacement attacks.

The attack targeted users installing these packages from PyPI, compromising their local browser environments. The malicious extensions were designed to intercept and modify cryptocurrency wallet addresses in the clipboard, potentially redirecting funds to attacker-controlled addresses.

This incident was documented by the OpenSSF's malicious-packages repository (MAL-2023-2472) and identified by Checkmarx security researchers. The campaign represents a significant supply chain attack affecting the Python ecosystem.

Indicators of compromise

Packages
  • yvper

Remediation

  • Immediately uninstall yvper and any other suspicious packages from the affected campaign
  • Audit installed browser extensions and remove any unfamiliar or suspicious extensions
  • Review cryptocurrency wallet addresses and transaction history for signs of manipulation
  • Check clipboard history for modified wallet addresses
  • Update all dependencies and use only verified packages from PyPI
  • Monitor PyPI for similar malicious package distributions
  • Use package verification tools and check package integrity before installation

Sources

  1. GitHub Advisory GHSA-qpgg-2jf8-jh25 · GitHub Advisory Database

Cite this entry

"Malicious code in yvper (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-yvper-pypi-37u9gd

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