CVE-2026-59937 [HIGH] – pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.