CVE-2026-41314: pypdf: Manipulated FlateDecode image dimensions can exhaust RAM

April 16, 2026 (updated May 5, 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/commit/ac734dab4eef92bcce50d503949b4d9887d89f11
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
nvd.nist.gov/vuln/detail/CVE-2026-41314

Code Behaviors & Features

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