UNKNOWN PyPI
pypdf vulnerable to inefficient decoding of ASCIIHexDecode streams
GHSA-9m86-7pmv-2852 · CVE-2026-28804 · PYSEC-2026-3014
Published · Modified
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Description
Impact
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.
Patches
This has been fixed in pypdf==6.7.5.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3666.
References
- WEB https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-28804
- WEB https://github.com/py-pdf/pypdf/pull/3666
- WEB https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f
- PACKAGE https://github.com/py-pdf/pypdf
- WEB https://github.com/py-pdf/pypdf/releases/tag/6.7.5
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