Uncaught Exception Affecting asteval package, versions [,1.0.9)
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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)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
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.