GHSA-x284-j5p8-9c5p: pypdf: Manipulated FlateDecode image dimensions can exhaust RAM

April 16, 2026

An attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using /FlateDecode with large size values.

References

github.com/advisories/GHSA-x284-j5p8-9c5p
github.com/py-pdf/pypdf
github.com/py-pdf/pypdf/pull/3734
github.com/py-pdf/pypdf/releases/tag/6.10.2
github.com/py-pdf/pypdf/security/advisories/GHSA-x284-j5p8-9c5p

Code Behaviors & Features

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