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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-119207

pypdf: Possible large memory usage for exceptions in strict mode

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

py-pdf pypdf

  • < 6.21.3affected

References