CVE-2026-59937

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/py-pdf/pypdf/commit/b5fc5aa714f4b696fb9b1deaa35a9e4a4eb50dae	Patch
https://github.com/py-pdf/pypdf/pull/3887	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.14.0	Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-55h5-xmcq-c37v	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:py-pdf:pypdf:*:*:*:*:*:*:*:*

History

02 Nov 2026, 16:06

Type	Values Removed	Values Added
First Time		Py-pdf pypdf Py-pdf
CPE	cpe:2.3:a:pypdf_project:pypdf::::::::	cpe:2.3:a:py-pdf:pypdf::::::::

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) pypdf es una biblioteca PDF de Python puro, gratuita y de código abierto. Antes de la versión 6.14.0, un atacante puede crear un PDF con flujos de referencias cruzadas malformados y repetidos que hacen que pypdf emplee largos tiempos de ejecución para recuperar entradas de tablas de referencias cruzadas rotas. Este problema está solucionado en la versión 6.14.0.

Information

Published : 2026-07-08 18:16

Updated : 2026-11-02 16:06

NVD link : CVE-2026-59937

Mitre link : CVE-2026-59937

CVE.ORG link : CVE-2026-59937

JSON object : View

Products Affected

py-pdf

pypdf

CWE

CWE-400

Uncontrolled Resource Consumption

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