CVE-2026-119206

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.21.3

Description The page labels property can take excessive time to retrieve page labels when processing a crafted PDF containing a flat page-label number tree with many ranges. This occurs because the property resolves each page independently and repeatedly scans the same /Nums array from the beginning, leading to increased processing time as the page count and the number of label ranges grow.

Recommendations Update to version 6.21.3.