---
id: "MAL-2026-16346"
kind: "package"
aliases: ["MAL-2026-16346"]
title: "Malicious code in rrs (PyPI)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "rrs", "fixed": [], "affected": "= 0.4.105; = 0.3.100; = 0.4.106; = 0.4.103; = 0.4.102; = 0.4.104; = 0.3.5; = 0.1.0; = 0.1.3; = 0.1.4; = 0.1.5; = 0.1.7; = 0.1.8; = 0.2.0; = 0.2.1; = 0.2.2; = 0.3.101; = 0.4.107; = 0.4.108; = 0.4.109", "ecosystem": "pypi"}]
ecosystems: ["pypi"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-09-21T03:46:09+00:00"
first_seen_at: "2026-10-26T20:51:58+00:00"
updated_at: "2026-10-26T21:10:31+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-16346", "first_seen_at": "2026-10-26T20:51:58+00:00"}]
---

# Malicious code in rrs (PyPI)

## Affected

- pypi:rrs affected = 0.4.105; = 0.3.100; = 0.4.106; = 0.4.103; = 0.4.102; = 0.4.104; = 0.3.5; = 0.1.0; = 0.1.3; = 0.1.4; = 0.1.5; = 0.1.7; = 0.1.8; = 0.2.0; = 0.2.1; = 0.2.2; = 0.3.101; = 0.4.107; = 0.4.108; = 0.4.109 fixed ?

## Timeline

- 2026-10-26T20:51:58+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-16346

## From the sources

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

## Source: amazon-inspector (78c488c5d20c788e88c2d4f0a0cb1eb03317bc71edb05964adad62241fd1295e)
On launch of the `rrs` CLI, a background thread captures a full-screen screenshot via `mss` and POSTs the image together with hostname, username, OS/release, local IP, and timestamp to a hardcoded Discord webhook at https://discord.com/api/webhooks/1549807268294303860/... The upload runs unconditionally at startup, with no consent prompt and no user-configurable destination; the webhook is controlled by the package author and is not disclosed as a destination for screen contents. Separately, `Network.start` opens an MQTT connection to the public broker `broker.hivemq.com:1883` and publishes a JSON identity record (id, hostname, username, os) to the shared topic `rrs/v1/presence` every 5 seconds, exposing installer host and user identifiers to any subscriber of that world-readable topic. Screen contents typically include private data, credentials, tokens, and messages visible on the desktop at the moment of capture.

## Source: kam193 (68c88bf30122de71b155310172fb01864659adaf9cc53c576695a82e2ff95d0d)
The package automatically and silently exfiltrates screenshots to a hardcoded location.


---

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


Campaign: 2026-09-rrs


Reasons (based on the campaign):


 - spyware-like


 - The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

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