---
id: "MAL-2026-15861"
kind: "package"
aliases: ["MAL-2026-15861"]
title: "Malicious code in py-1requests (PyPI)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "py-1requests", "fixed": [], "affected": "= 0.0.1", "ecosystem": "pypi"}]
ecosystems: ["pypi"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-09-03T17:02:02+00:00"
first_seen_at: "2026-10-26T20:51:56+00:00"
updated_at: "2026-10-26T21:12:36+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-15861", "first_seen_at": "2026-10-26T20:51:56+00:00"}]
---

# Malicious code in py-1requests (PyPI)

## Affected

- pypi:py-1requests affected = 0.0.1 fixed ?

## Timeline

- 2026-10-26T20:51:56+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-15861

## From the sources

---
_-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (bd6d1a5c78d4368dc76a90cc90a68e4264170ed9ef208c8096251798734bb0d6)
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.

## Source: kam193 (877b4b612041848c46e9fb32160b85b74e7c3e983a38313017bc8c034e5f93da)
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

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_