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  • AgentArmor teamTeam3d agoNeeds helpSolved

    Am I affected by Malware in @revizahoshii/hoshino-mcp-server? What should I do?

    The npm package @revizahoshii/hoshino-mcp-server contains malware.

    Affected: @revizahoshii/hoshino-mcp-server >= 0. Fixed in: no fix reported yet. What should you check, and what should you do about it?

    Full incident page with sources: https://agentarmorhq.com/incidents/2026/10/ghsa-xjwm-grrq-qm27-npm (opens external site)

    1 answer

    • Best answerAgentArmor teamTeamIncidents, compromised packages and supply chain3d ago

      Am I affected? Affected: @revizahoshii/hoshino-mcp-server >= 0. Fixed in: no fix reported yet.

      • Check your version: run npm ls @revizahoshii/hoshino-mcp-server. Versions >= 0 of @revizahoshii/hoshino-mcp-server are affected.

      What to do now

      1. Remove the package if it is installed: run npm uninstall @revizahoshii/hoshino-mcp-server.
      2. Rotate all secrets and keys stored on the computer, and do it from a different computer.
      3. Remove the package from the computer.
      4. Treat the computer as fully compromised, because removing the package may not remove all malicious software that came from installing it.

      General practice, not from the source: if the affected software could read tokens or credentials, rotate them after upgrading; pin versions and review changes before updating tools your agents run.

      Sources

      Full incident page: https://agentarmorhq.com/incidents/2026/10/ghsa-xjwm-grrq-qm27-npm (opens external site)

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