CVE-2026-33123

MEDIUM

6.5

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published3/20/2026

Last Modified3/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

pypdf_project:pypdf

Weaknesses (CWE)

CWE-400CWE-407

References

https://github.com/py-pdf/pypdf/pull/3686(security-advisories@github.com)

https://github.com/py-pdf/pypdf/releases/tag/6.9.1(security-advisories@github.com)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-qpxp-75px-xjcp(security-advisories@github.com)

IOC Correlations

No correlations recorded

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