CVE-2026-28351

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.

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/f309c6003746414dc7b5048c19e6d879ff2dc858	Patch
https://github.com/py-pdf/pypdf/pull/3664	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.7.4	Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-f2v5-7jq9-h8cg	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

03 Mar 2026, 18:36

Type	Values Removed	Values Added
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::::::::
References	~~() https://github.com/py-pdf/pypdf/commit/f309c6003746414dc7b5048c19e6d879ff2dc858 -~~	() https://github.com/py-pdf/pypdf/commit/f309c6003746414dc7b5048c19e6d879ff2dc858 - Patch
References	~~() https://github.com/py-pdf/pypdf/pull/3664 -~~	() https://github.com/py-pdf/pypdf/pull/3664 - Issue Tracking, Patch
References	~~() https://github.com/py-pdf/pypdf/releases/tag/6.7.4 -~~	() https://github.com/py-pdf/pypdf/releases/tag/6.7.4 - Release Notes
References	~~() https://github.com/py-pdf/pypdf/security/advisories/GHSA-f2v5-7jq9-h8cg -~~	() https://github.com/py-pdf/pypdf/security/advisories/GHSA-f2v5-7jq9-h8cg - Patch, Vendor Advisory

27 Feb 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-27 21:16

Updated : 2026-03-03 18:36

NVD link : CVE-2026-28351

Mitre link : CVE-2026-28351

CVE.ORG link : CVE-2026-28351

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-400

Uncontrolled Resource Consumption

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