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Malicious package

@mastra/mongodbnpm

Malicious code in @mastra/mongodb (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-5957
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @mastra/mongodb

What this malware does

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

1 flagged
1.9.3

Indicators of compromise (SHA-256)

49f8ee83c01b471839bea21d7231e347b261071539611998f952f050cded4cbb
5d9d4055131eab968701734146ee6c3bafe19f3fecdc71e8a99ac2c7258ccdf8

Detection & response playbook

Malicious package
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for @mastra/mongodb (version 1.9.3). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging @mastra/mongodb across your stack and pipelines.

  2. If you installed it — respond

    Remove @mastra/mongodb from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If @mastra/mongodb was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks @mastra/mongodb before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. @mastra/mongodb on npm has been identified as a malicious package (version 1.9.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-prf3-w8mj-rf6j

References

Detect & block this

O3 blocks @mastra/mongodb-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

@mastra/mongodb (npm) malicious package — MAL-2026-5957 | O3 Security