CVE-2026-33123

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.1 allow an attacker to craft a malicious PDF which leads to long runtimes and/or large memory usage. Exploitation requires accessing an array-based stream with many entries. This issue has been fixed in version 6.9.1.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400 CWE-407

Affected software

No affected versions have been published.

Timeline

Published: Mar 20, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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