Which versions of @mastra/mcp are malicious?

The following npm versions of @mastra/mcp are flagged malicious: 1.10.1. Treat any of these as compromised.

How do I remediate @mastra/mcp if I installed it?

Remove @mastra/mcp 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 network activity or persistence. Use O3 Security's dependency scanner to confirm the package and its artifacts are fully purged across your stack.

Is @mastra/mcp part of a known attack campaign?

Yes — @mastra/mcp is associated with the GHSA-wfr8-6x4q-hpr3 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

Can O3 Security detect @mastra/mcp in my codebase?

Yes. O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, blocking @mastra/mcp and packages like it before any post-install script runs.

Malicious package

@mastra/mcpnpm

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

MAL-2026-5955

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall @mastra/mcp

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

1.10.1

Indicators of compromise (SHA-256)

e2c2d05f943ea7c6d8e1ae3bcfb7acc5497d114f89e6199f50e0ea3119256be2

770a2affd54a22ab70fb3b308f48e9fcd6a365f8e5c2f1fd91a6f7e3f2157e40

Frequently asked questions

No. @mastra/mcp on npm has been identified as a malicious package (version 1.10.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-wfr8-6x4q-hpr3

References

github.com

Scan your dependencies

O3 Security blocks malicious packages like this at install time and in CI.

Supply-chain protection