Vulnerability Details CVE-2026-113792
pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, calling PdfWriter.find_outline_item on a crafted PDF with a cyclic outline hierarchy can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 40.5%
CVSS Severity
CVSS v3 Score 3.3