CVE-2026-40260

pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has been fixed in version 6.10.0.

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/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8	Patch
https://github.com/py-pdf/pypdf/pull/3724	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.10.0	Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx	Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

22 Apr 2026, 20:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3
CPE		cpe:2.3:a:pypdf_project:pypdf::::::::
First Time		Pypdf Project Pypdf Project pypdf
References	~~() https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8 -~~	() https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8 - Patch
References	~~() https://github.com/py-pdf/pypdf/pull/3724 -~~	() https://github.com/py-pdf/pypdf/pull/3724 - Issue Tracking, Patch
References	~~() https://github.com/py-pdf/pypdf/releases/tag/6.10.0 -~~	() https://github.com/py-pdf/pypdf/releases/tag/6.10.0 - Product, Release Notes
References	~~() https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx -~~	() https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx - Mitigation, Patch, Vendor Advisory

17 Apr 2026, 01:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-17 01:17

Updated : 2026-04-22 20:16

NVD link : CVE-2026-40260

Mitre link : CVE-2026-40260

CVE.ORG link : CVE-2026-40260

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-776

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

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