Uncontrolled Recursion Affecting lopdf package, versions <0.42.0
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- published27 Jun 2026
- disclosed21 Jun 2026
- creditUnknown
Introduced: 21 Jun 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 lopdf to version 0.42.0 or higher.
Overview
Affected versions of this package are vulnerable to Uncontrolled Recursion through the load_mem function and related entry points when parsing deeply nested PDF arrays and dictionaries without enforcing a maximum recursion depth. An attacker can cause the process to exhaust the call stack and abort, resulting in a crash, by supplying a specially crafted PDF file with excessive nesting.