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[ CVE-2026-119207 · Published 29 Oct 2026 ]

pypdf has possible large memory usage for exceptions in strict mode

CVSS 5.5 EPSS <1%Fix available

[ Description ]Official description

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory when strict mode loads a crafted invalid PDF dictionary. Nested parsing failures add repeated exception text to newly raised errors, allowing a small malformed dictionary to amplify into very large error messages. This issue is fixed in version 6.21.3.

[ Fixes ]Fixes and patches

  • pypdf 6.21.3Fixed version · GitHub Advisories · pip package pypdf: upgrade to 6.21.3 or later (affected < 6.21.3)
  • 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
  • Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Packages ]Affected open-source packages

[ References ]References