CVE-2026-49460

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor. This vulnerability is fixed in 6.12.2.

CVSS v3 3.3 LOW

3.3^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/py-pdf/pypdf/pull/3806	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.12.2	Patch Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-5hgr-hg42-57jg	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) pypdf es una biblioteca PDF de Python puro, gratuita y de código abierto. Antes de la 6.12.2, un atacante que utiliza esta vulnerabilidad puede crear un PDF que provoca tiempos de ejecución prolongados. Esto requiere acceder a un flujo que utiliza el filtro /FlateDecode con un predictor PNG. Esta vulnerabilidad está corregida en la 6.12.2.

Information

Published : 2026-06-22 21:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-49460

Mitre link : CVE-2026-49460

CVE.ORG link : CVE-2026-49460

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-407

Inefficient Algorithmic Complexity

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