Uncaught Exception Affecting asteval package, versions [,1.0.9)
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-ASTEVAL-19233313
- published23 Aug 2026
- disclosed20 Aug 2026
- creditmhamzakhattak
Introduced: 20 Aug 2026
NewCVE-2026-55244 (opens in a new tab)How to fix?
Upgrade asteval to version 1.0.9 or higher.
Overview
asteval is a Safe, minimalistic evaluator of python expression using ast module
Affected versions of this package are vulnerable to Uncaught Exception via the eval process. An attacker can terminate the application process or disrupt signal and cleanup handlers by supplying specially crafted expressions that raise subclasses of BaseException not caught by standard exception handling.