Uncontrolled Recursion Affecting cpython package, versions [0,]
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Uncontrolled Recursion vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-CONAN-CPYTHON-15674494
- published17 Mar 2026
- disclosed16 Mar 2026
- creditUnknown
Introduced: 16 Mar 2026
CVE-2026-4224 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Uncontrolled Recursion in the conv_content_model() function when parsing an inline document type definition containing a deeply nested content model. An attacker can cause a stack overflow and crash the process by providing specially crafted XML input with excessive nesting.