PT-2026-56528 · Py Pdf · Pypdf

Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-59938

NVD

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2026-59938

Affected Products

Pypdf

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-59938 · Security Note
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-5qjq-93h5-hrgp · Note
• https://github.com/py-pdf/pypdf/releases/tag/6.14.0 · Note
• https://github.com/py-pdf/pypdf/pull/3888 · Note
• https://github.com/py-pdf/pypdf/commit/c64583be16b8e8763d8777075f8ecbf382014b7a · Note