Which versions of vfat-ai are malicious?

The following PyPI versions of vfat-ai are flagged malicious: 0.3.151. Treat any of these as compromised.

How do I remediate vfat-ai if I installed it?

vfat-ai 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 vfat-ai — how do I know if it already compromised me?

If vfat-ai 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 vfat-ai part of a known attack campaign?

Yes — vfat-ai is associated with the 2026-05-vfat 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 vfat-ai across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for vfat-ai (version 0.3.151).

Malicious package

vfat-aiPyPI

Advisory published May 19, 2026Updated May 19, 2026

vfat-ai is a confirmed malicious PyPI package (MAL-2026-4163) that steals credentials and exfiltrates sensitive data (malicious version 0.3.151). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in vfat-ai (PyPI)

MAL-2026-4163

Immediate action

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

pip uninstall vfat-ai

What this malware does

The package exfiltrates sensitive files and env variables

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

Campaign: 2026-05-vfat

Reasons (based on the campaign):

exfiltration-generic
exfiltration-env-variables
exfiltration-credentials

Malicious versions

1 flagged

0.3.151

Indicators of compromise (SHA-256)

98a606c66789ae1326b7e1802465d1650ef2c691821578936448f403ec421bb0

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for vfat-ai (version 0.3.151).
If you installed it — respond
vfat-ai 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 vfat-ai 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. vfat-ai on PyPI has been identified as a malicious package (version 0.3.151 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-05-vfat

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks vfat-ai-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

All malware advisories How O3 detects malware Vulnerability database