Which versions of fastpi are malicious?

The following PyPI versions of fastpi are flagged malicious: 0.128.0, 0.128.1, 0.128.2. Treat any of these as compromised.

How do I remediate fastpi if I installed it?

fastpi 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 fastpi — how do I know if it already compromised me?

If fastpi 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 fastpi part of a known attack campaign?

Yes — fastpi is associated with the 2026-01-fastpi 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 fastpi across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for fastpi (3 malicious versions).

Malicious package

fastpiPyPI

Advisory published Jan 30, 2026Updated Jan 31, 2026

fastpi is a confirmed malicious PyPI package (MAL-2026-613) that steals credentials and exfiltrates sensitive data (malicious versions 0.128.0, 0.128.1, 0.128.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in fastpi (PyPI)

MAL-2026-613

Immediate action

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

pip uninstall fastpi

What this malware does

Malicious copy of the legitimate FastAPI. The modification loads code encrypted in one of the attached files. The final, highly obfuscated code is most likely similar to the code from 2026-01-pypi-package-explore, with the exact behavior unknown.

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

Campaign: 2026-01-fastpi

Reasons (based on the campaign):

clones-real-package
obfuscation
typosquatting

Malicious versions

3 flagged

0.128.00.128.10.128.2

Indicators of compromise (SHA-256)

2928970260fda87aaa57272b8042ae1a9661ad1a1bdeec1e73903e84ce3354cd

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for fastpi (3 malicious versions).
If you installed it — respond
fastpi 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 fastpi 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. fastpi on PyPI has been identified as a malicious package (versions 0.128.0, 0.128.1, 0.128.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-01-fastpi

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks fastpi-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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