Arbitrary Code Injection Affecting mesop package, versions [,1.2.3)
Threat Intelligence
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Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-MESOP-17751643
- published1 Jul 2026
- disclosed29 Jun 2026
- creditUnknown
Introduced: 29 Jun 2026
CVE-2026-33057 (opens in a new tab)How to fix?
Upgrade mesop to version 1.2.3 or higher.
Overview
mesop is a Build UIs in Python
Affected versions of this package are vulnerable to Arbitrary Code Injection due to 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.