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/pagelabels.py to generate strings beyond a reasonable page-label length when an application retrieves document page labels, consuming...

PT-2026-103591

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.19.0 Description A crafted PDF file can contain unusually large alphabetical page-label values. When an application retrieves document page labels, the pypdf/ page labels.py module generates strings that exceed a...