CVE-2026-113791 – pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing a content stream with many small operations, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.