CVE-2026-41313

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a	Patch
https://github.com/py-pdf/pypdf/pull/3735	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.10.2	Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

27 Apr 2026, 19:30

Type	Values Removed	Values Added
First Time		Pypdf Project Pypdf Project pypdf
CPE		cpe:2.3:a:pypdf_project:pypdf::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
References	~~() https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a -~~	() https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a - Patch
References	~~() https://github.com/py-pdf/pypdf/pull/3735 -~~	() https://github.com/py-pdf/pypdf/pull/3735 - Issue Tracking, Patch
References	~~() https://github.com/py-pdf/pypdf/releases/tag/6.10.2 -~~	() https://github.com/py-pdf/pypdf/releases/tag/6.10.2 - Release Notes
References	~~() https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw -~~	() https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw - Patch, Vendor Advisory

22 Apr 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-22 22:16

Updated : 2026-04-27 19:30

NVD link : CVE-2026-41313

Mitre link : CVE-2026-41313

CVE.ORG link : CVE-2026-41313

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-834

Excessive Iteration

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