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CVE PROGRAM SOURCE RECORD6.9 Medium

CVE-2026-28804

pypdf: Inefficient decoding of ASCIIHexDecode streams

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

Affected products

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

py-pdf pypdf

  • < 6.7.5affected

References