Which versions of foundry-utils are malicious?

The following PyPI versions of foundry-utils are flagged malicious: 0.3.0, 0.3.1, 0.3.2, 0.3.3. Treat any of these as compromised.

How do I remediate foundry-utils if I installed it?

foundry-utils is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed foundry-utils — how do I know if it already compromised me?

If foundry-utils was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is foundry-utils part of a known attack campaign?

Yes — foundry-utils is associated with the 2026-05-foundry-utils campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find foundry-utils across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for foundry-utils (4 malicious versions).

Malicious package

foundry-utilsPyPI

Advisory published May 18, 2026Updated May 18, 2026

foundry-utils is a confirmed malicious PyPI package (MAL-2026-3834) that steals credentials and exfiltrates sensitive data (malicious versions 0.3.0, 0.3.1, 0.3.2…). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in foundry-utils (PyPI)

MAL-2026-3834

Immediate action

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

pip uninstall foundry-utils

What this malware does

In specific environments, the package triggers silent code execution during installation. The code to execute is not included in the package.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-05-foundry-utils

Reasons (based on the campaign):

dependency-confusion
other

Malicious versions

4 flagged

0.3.00.3.10.3.20.3.3

Indicators of compromise (SHA-256)

9f62cf5a646cd39640b2be03720a6a2195dc4924813146e9a0d387bafa75c7de

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for foundry-utils (4 malicious versions).
If you installed it — respond
foundry-utils is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If foundry-utils was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. foundry-utils on PyPI has been identified as a malicious package (versions 0.3.0, 0.3.1, 0.3.2, 0.3.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-05-foundry-utils

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks foundry-utils-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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