Risk Letters

Exploited vulnerability

CVE-2026-33057

TLP:CLEAR

mesop-dev mesop Improper Control of Generation of Code ('Code Injection')

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 wil

Facts

  • Vendor: mesop-dev
  • Product: mesop
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 5.3 %
  • First known exploitation: 26 September 2026
  • First seen by Risk Letters: 20 March 2026

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Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD