MEDIUM 6.5 PyPI
pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM
GHSA-7gw9-cf7v-778f · CVE-2026-41312
Published · Modified
Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing a stream compressed using /FlateDecode with a /Predictor unequal 1 and large predictor parameters.
Patches
This has been fixed in pypdf==6.10.2.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3734.
References
- WEB https://github.com/py-pdf/pypdf/security/advisories/GHSA-7gw9-cf7v-778f
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-41312
- WEB https://github.com/py-pdf/pypdf/pull/3734
- WEB https://github.com/py-pdf/pypdf/commit/ac734dab4eef92bcce50d503949b4d9887d89f11
- PACKAGE https://github.com/py-pdf/pypdf
- WEB https://github.com/py-pdf/pypdf/releases/tag/6.10.2
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