CVE-2026-41312

UNKNOWN 0.0

pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 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. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.

CWE	CWE-789
Vendor	py-pdf
Product	pypdf
Published	Apr 22, 2026
Last Updated	Apr 22, 2026

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Affected Versions

py-pdf / pypdf

< 6.10.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-7gw9-cf7v-778f github.com: https://github.com/py-pdf/pypdf/pull/3734 github.com: https://github.com/py-pdf/pypdf/commit/ac734dab4eef92bcce50d503949b4d9887d89f11 github.com: https://github.com/py-pdf/pypdf/releases/tag/6.10.2