CVE-2026-41168

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.

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/62338e9d36419cf193ccec7331784f45df1d70b3	Patch
https://github.com/py-pdf/pypdf/pull/3733	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.10.1	Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx	Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

24 Apr 2026, 13:07

Type	Values Removed	Values Added
References	~~() https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3 -~~	() https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3 - Patch
References	~~() https://github.com/py-pdf/pypdf/pull/3733 -~~	() https://github.com/py-pdf/pypdf/pull/3733 - Issue Tracking, Patch
References	~~() https://github.com/py-pdf/pypdf/releases/tag/6.10.1 -~~	() https://github.com/py-pdf/pypdf/releases/tag/6.10.1 - Product, Release Notes
References	~~() https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx -~~	() https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx - Mitigation, Patch, Vendor Advisory
First Time		Pypdf Project Pypdf Project pypdf
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3
CPE		cpe:2.3:a:pypdf_project:pypdf::::::::

22 Apr 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-22 21:17

Updated : 2026-04-24 13:07

NVD link : CVE-2026-41168

Mitre link : CVE-2026-41168

CVE.ORG link : CVE-2026-41168

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-834

Excessive Iteration

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