CVE-2026-59938

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.

PUBLISHED Reserved 2026-07-07 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M

Problem types

CWE-789: Memory Allocation with Excessive Size Value

Product status

References

github.com/.../pypdf/security/advisories/GHSA-5qjq-93h5-hrgp

github.com/py-pdf/pypdf/pull/3888

github.com/...ommit/c64583be16b8e8763d8777075f8ecbf382014b7a

github.com/py-pdf/pypdf/releases/tag/6.14.0

cve.org (CVE-2026-59938)

nvd.nist.gov (CVE-2026-59938)

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