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 ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

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?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for fastpi (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging fastpi across your stack and pipelines.

Malicious package

fastpiPyPI

Malicious code in fastpi (PyPI) Remove it immediately and rotate any exposed credentials.

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
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for fastpi (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging fastpi across your stack and pipelines.
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 ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks fastpi before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

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