CVE-2026-33057
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
Mesop is a Python-based UI framework that allows users to build web applications. In versions 1.2.2 and below, 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. 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...). This issue has been fixed in version 1.2.3.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 4.11% — more likely to be exploited than 91% of all CVEs |
| Weakness | CWE-94 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2026-03-20 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| mesop-dev | mesop |
References
→ the Explorer · watch your stack · NVD