---
id: CVE-2024-3955
aliases:
  - GHSA-4f92-w438-f484
  - PYSEC-2026-308
title: CraftBeerPi 4 allows arbitrary code execution
summary: CraftBeerPi 4 allows arbitrary code execution
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: cbpi4
product: cbpi4
ecosystem: pip
affected:
  - 'cbpi4 >= 4.0.0.58, < 4.4.1.a1'
patched:
  - cbpi4 4.4.1.a1
published: '2024-05-02'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T16:30:06.791472908Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-4f92-w438-f484'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-3955'
  - url: 'https://github.com/PiBrewing/craftbeerpi4/issues/132'
  - url: 'https://cert.pl/en/posts/2024/05/CVE-2024-3955'
  - url: 'https://cert.pl/posts/2024/05/CVE-2024-3955'
  - url: 'https://github.com/PiBrewing/craftbeerpi4'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/cbpi4/PYSEC-2026-308.yaml
  - url: 'https://pypi.org/project/cbpi4'
  - url: 'https://github.com/advisories/GHSA-4f92-w438-f484'
tags:
  - osv
  - pip
  - ghsa
epss: 0.01149
epssPercentile: 0.66681
cwe:
  - CWE-94
ingestedAt: '2026-10-27T16:32:34.361Z'
---

## Overview

URL GET parameter "logtime" utilized within the "downloadlog" function from "cbpi/http_endpoints/http_system.py" is subsequently passed to the "os.system" function in "cbpi/controller/system_controller.py" without prior validation allowing arbitrary code execution. This issue affects CraftBeerPi 4: from 4.0.0.58 (commit 563fae9) before 4.4.1.a1 (commit 57572c7).

## Affected packages

- `cbpi4 >= 4.0.0.58, < 4.4.1.a1`

## Remediation

Upgrade to a patched release:

- `cbpi4 4.4.1.a1`