PT-2026-34567 · Py Pdf · Pypdf

Published 2026-04-22 · Updated 2026-04-22 · CVE-2026-41314

NVD

CVSS v4.0

4.8

Medium

AV:L/AC:L/AT:N/PR:N/UI:P/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. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using /FlateDecode with large size values. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.

Fix

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2026-41314

Affected Products

Pypdf

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-41314 · Security Note
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-x284-j5p8-9c5p · Note
• https://github.com/py-pdf/pypdf/releases/tag/6.10.2 · Note
• https://github.com/py-pdf/pypdf/pull/3734 · Note
• https://github.com/py-pdf/pypdf/commit/ac734dab4eef92bcce50d503949b4d9887d89f11 · Note