CVE-2026-28804

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f	Patch
https://github.com/py-pdf/pypdf/pull/3666	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.7.5	Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852	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::::::::

Information

Published : 2026-03-06 07:16

Updated : 2026-11-02 16:06

NVD link : CVE-2026-28804

Mitre link : CVE-2026-28804

CVE.ORG link : CVE-2026-28804

JSON object : View

Products Affected

py-pdf

pypdf

CWE

CWE-407

Inefficient Algorithmic Complexity

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