Which versions of @mastra/playground-ui are malicious?

The following npm versions of @mastra/playground-ui are flagged malicious: 33.0.1. Treat any of these as compromised.

How do I remediate @mastra/playground-ui if I installed it?

Remove @mastra/playground-ui 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/playground-ui part of a known attack campaign?

Yes — @mastra/playground-ui is associated with the GHSA-25cg-799c-2gpr 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/playground-ui 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/playground-ui and packages like it before any post-install script runs.

Malicious package

@mastra/playground-uinpm

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

MAL-2026-6033

Immediate action

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

npm uninstall @mastra/playground-ui

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

33.0.1

Indicators of compromise (SHA-256)

4a1183fddcc1c7e3be311a4e6fb47609f1b770087fdae294cba960c154845cf6

Frequently asked questions

No. @mastra/playground-ui on npm has been identified as a malicious package (version 33.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-25cg-799c-2gpr

References

github.com

Scan your dependencies

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

Supply-chain protection