Which versions of @mastra/deployer are malicious?

The following npm versions of @mastra/deployer are flagged malicious: 1.42.1. Treat any of these as compromised.

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

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

Yes — @mastra/deployer is associated with the GHSA-rjjh-j9jr-wg46 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/deployer 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/deployer and packages like it before any post-install script runs.

Malicious package

@mastra/deployernpm

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

MAL-2026-6015

Immediate action

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

npm uninstall @mastra/deployer

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

1.42.1

Indicators of compromise (SHA-256)

cbd99dea462f2f28099ae0f57cd6c89edd76f08476cd9a6265b1c23defcd2b23

6477e8a63b0c24f6b12245b578c198714cbfe2f10c075653f1721220b128cc62

Frequently asked questions

No. @mastra/deployer on npm has been identified as a malicious package (version 1.42.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-rjjh-j9jr-wg46

References

github.com

Scan your dependencies

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

Supply-chain protection