CVE-2026-28804

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.

PUBLISHED Reserved 2026-03-03 | Published 2026-03-06 | Updated 2026-03-06 | Assigner GitHub_M

Problem types

CWE-407: Inefficient Algorithmic Complexity

Product status

References

github.com/.../pypdf/security/advisories/GHSA-9m86-7pmv-2852

github.com/py-pdf/pypdf/pull/3666

github.com/...ommit/648c627d2657447dfb1773412af05a0a5103b98f

github.com/py-pdf/pypdf/releases/tag/6.7.5

cve.org (CVE-2026-28804)

nvd.nist.gov (CVE-2026-28804)

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