Uncontrolled Recursion Affecting justhtml package, versions [,1.10.0)
Threat Intelligence
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
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 applications- Snyk IDSNYK-PYTHON-JUSTHTML-15758895
- published23 Mar 2026
- disclosed17 Mar 2026
- creditkq5y
Introduced: 17 Mar 2026
New CVE NOT AVAILABLE CWE-674 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade justhtml to version 1.10.0 or higher.
Overview
justhtml is an A pure Python HTML5 parser that just works.
Affected versions of this package are vulnerable to Uncontrolled Recursion in the construction, when parsing deeply nested HTML structures. An attacker can cause the application to terminate unexpectedly or fail requests by supplying HTML input with excessive nesting, which triggers unbounded recursion and results in an unhandled RecursionError.