CVE-2026-103000 — pypdf: Possible large memory usage when retrieving alphabetical page labels
pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF can provide unusually large alphabetical page-label values that cause pypdf/_page_labels.…
Published: 2026-09-30 · CVSS: 8.7 · CVSS 4.0
pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF can provide unusually large alphabetical page-label values that cause pypdf/_page_labels.py to generate strings beyond a reasonable page-label length when an application retrieves document page labels, consuming excessive memory and potentially making the application unavailable. This issue is fixed in version 6.19.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7