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CVE PROGRAM SOURCE RECORD4.6 Medium

CVE-2026-33699

pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream

Description

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.

Affected products

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

py-pdf pypdf

  • < 6.9.2affected

References