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[ CVE-2026-103000 · Published 30 Sep 2026 ]

pypdf: Possible large memory usage when retrieving alphabetical page labels

CVSS 7.5 EPSS <1%Fix available

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

  • pypdf 6.19.0Fixed version · GitHub Advisories · pip package pypdf: upgrade to 6.19.0 or later (affected < 6.19.0)
  • Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
  • Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Packages ]Affected open-source packages

[ References ]References