CVE-2026-24688 — pypdf has possible Infinite Loop when processing outlines/bookmarks
pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which lea…
Published: 2026-01-27 · CVSS: 5.1 · CVSS 4.0
pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects cannot upgrade yet, consider applying the changes from PR #3610 manually.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7