Start your free trial today.
Protect your organization with cutting-edge cybersecurity solutions designed for resilience and efficiency. Secure your digital assets with confidence.
Your Shield Against Threats
Unleash the Power of Cybersecurity
Boost Your Security, Enhance Your Business
We solve Your Cyber Challenges
Quick Links
Resources
Deepaegis Portals
2025 Deepaegis. All Rights Reserved.
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked generated destination references rather than the original source references, allowing some source cycles to evade the visited-object check. This issue is fixed in version 6.21.4.
Published
October 29, 2026
Last Modified
October 29, 2026