CVE-2026-28804

UNKNOWN 0.0

pypdf: Inefficient decoding of ASCIIHexDecode streams

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-407
Vendor	py-pdf
Product	pypdf
Published	Mar 6, 2026
Last Updated	Mar 6, 2026

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Affected Versions

py-pdf / pypdf

< 6.7.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852 github.com: https://github.com/py-pdf/pypdf/pull/3666 github.com: https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f github.com: https://github.com/py-pdf/pypdf/releases/tag/6.7.5