CVE-2026-59938 MEDIUM

CVE-2026-59938: pypdf: Possible large memory usage for wrong image dimensions

Vendor Py-Pdf
Product pypdf
Weakness CWE-789
Published July 8, 2026
Last update July 8, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 8, 2026 CVE published