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VULNERABILITIES

CVE-2026-33123 Details

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.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/py-pdf/pypdf/pull/3686 [email protected]Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.9.1 [email protected]ProductRelease Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-qpxp-75px-xjcp [email protected]PatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource Consumption[email protected]
CWE-407Inefficient Algorithmic Complexity[email protected]

Affected Products

ProductVersions
pypdf project pypdf
< 6.9.1

CPE

  • cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-33123
NVD Published Date:
Mar 20, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-33123 Details - Not Deferred