Class Pollution Affecting mesop package, versions [,0.14.1)
Threat Intelligence
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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Test your applications- Snyk IDSNYK-PYTHON-MESOP-9669339
- published8 Apr 2025
- disclosed27 Mar 2025
- creditjackfromeast, superboy-zjc
Introduced: 27 Mar 2025
NewCVE-2025-30358 (opens in a new tab)How to fix?
Upgrade mesop to version 0.14.1 or higher.
Overview
mesop is a Build UIs in Python
Affected versions of this package are vulnerable to Class Pollution in the _recursive_update_dataclass_from_json_obj() function, which doesn't raise an exception for dunder (__) properties. An attacker can cause denial of service by overwriting these elements, leading to server unresponsiveness. If the resulting values of these elements can be controlled in a given runtime, this could facilitate further exploits such as user impersonation and data corruption.