Which versions of @mastra/fastify are malicious?

The following npm versions of @mastra/fastify are flagged malicious: 1.3.31. Treat any of these as compromised.

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

Remove @mastra/fastify 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/fastify part of a known attack campaign?

Yes — @mastra/fastify is associated with the GHSA-q2q2-qp24-85vj 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/fastify 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/fastify and packages like it before any post-install script runs.

Malicious package

@mastra/fastifynpm

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

MAL-2026-5949

Immediate action

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

npm uninstall @mastra/fastify

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

1.3.31

Indicators of compromise (SHA-256)

8e3fd453d8d4b3cf403d6d1445b295c8de0462a463c857388fb6c800c7c897cd

dfb6144bee6597839df4df62099a1fcd5276bd741f28dd662e9761a0ac30cb40

Frequently asked questions

No. @mastra/fastify on npm has been identified as a malicious package (version 1.3.31 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-q2q2-qp24-85vj

References

github.com

Scan your dependencies

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

Supply-chain protection