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[ CVE-2026-102994 · Published 30 Sep 2026 ]

pypdf: Possible long runtimes/large memory usage when parsing indirect objects

CVSS 7.5 EPSS <1%1 agency advisoryFix available

[ Description ]Official description

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that continue for a long time without whitespace can cause pypdf/_reader.py and pypdf/generic/_base.py to scan excessive input through read_until_whitespace, resulting in long runtimes and application unavailability. This issue is fixed in version 6.18.0.

[ Fixes ]Fixes and patches

  • pypdf 6.18.0Fixed version · GitHub Advisories · pip package pypdf: upgrade to 6.18.0 or later (affected < 6.18.0)
  • 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

[ Advisories ]Government CERT advisories

[ Packages ]Affected open-source packages

[ References ]References