Which versions of py-1requests are malicious?

The following PyPI versions of py-1requests are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate py-1requests if I installed it?

py-1requests 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 py-1requests — how do I know if it already compromised me?

If py-1requests 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 py-1requests part of a known attack campaign?

Yes — py-1requests is associated with the 2026-09-0requests, IN-MAL-2026-019386 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 py-1requests across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for py-1requests (version 0.0.1).

Malicious package

py-1requestsPyPI

Advisory published Sep 3, 2026Updated Sep 4, 2026

py-1requests is a confirmed malicious PyPI package (MAL-2026-15861) that steals credentials and exfiltrates sensitive data (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in py-1requests (PyPI)

MAL-2026-15861

Immediate action

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

pip uninstall py-1requests

What this malware does

py_1requests is a typosquat of the popular requests library (leading 1 inserted inside the name). On import, py_1requests/init.py iterates os.environ and collects every variable whose name starts with SECRET, API, TOKEN, or KEY, then opens a TCP socket to HOST:PORT and sends the serialized dict; HOST and PORT default to 127.0.0.1:9999 but are overridable via the TS_HOST and TS_PORT environment variables. The same init.py spawns a python subprocess that connects to the same host/port and sends a 'SHELL' marker, holding the connection open — a reverse-shell staging path. cli.py prints 'py_1requests installed -- targeting requests' and init.py prints '[typosquat] exfiltrating:...', in-source admissions of purpose. Both behaviors fire unconditionally on import with no documented purpose.

During import, the code exfiltrates potentially sensitive env variables. In all analyzed versions the exfiltration target was a localhost, suggesting it was just a test.

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: 2026-09-0requests

Reasons (based on the campaign):

exfiltration-env-variables
typosquatting

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

877b4b612041848c46e9fb32160b85b74e7c3e983a38313017bc8c034e5f93da

bd6d1a5c78d4368dc76a90cc90a68e4264170ed9ef208c8096251798734bb0d6

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for py-1requests (version 0.0.1).
If you installed it — respond
py-1requests 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 py-1requests 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. py-1requests on PyPI has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-09-0requestsIN-MAL-2026-019386

References

Credits

Amazon Inspector · finder
Kamil Mańkowski (kam193) · analyst

Detect & block this

O3 blocks py-1requests-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