CVE-2026-27024

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the children of a TreeObject, for example as part of outlines. This vulnerability is fixed in 6.7.1.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/py-pdf/pypdf/commit/bd2f6d052fe5941e85e37082c2a43453d48d1295	Patch
https://github.com/py-pdf/pypdf/pull/3645	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.7.1	Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-996q-pr4m-cvgq	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

24 Feb 2026, 15:19

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
References	~~() https://github.com/py-pdf/pypdf/commit/bd2f6d052fe5941e85e37082c2a43453d48d1295 -~~	() https://github.com/py-pdf/pypdf/commit/bd2f6d052fe5941e85e37082c2a43453d48d1295 - Patch
References	~~() https://github.com/py-pdf/pypdf/pull/3645 -~~	() https://github.com/py-pdf/pypdf/pull/3645 - Issue Tracking, Patch
References	~~() https://github.com/py-pdf/pypdf/releases/tag/6.7.1 -~~	() https://github.com/py-pdf/pypdf/releases/tag/6.7.1 - Product, Release Notes
References	~~() https://github.com/py-pdf/pypdf/security/advisories/GHSA-996q-pr4m-cvgq -~~	() https://github.com/py-pdf/pypdf/security/advisories/GHSA-996q-pr4m-cvgq - Patch, Vendor Advisory
First Time		Pypdf Project Pypdf Project pypdf
CPE		cpe:2.3:a:pypdf_project:pypdf::::::::

20 Feb 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-20 22:16

Updated : 2026-02-24 15:19

NVD link : CVE-2026-27024

Mitre link : CVE-2026-27024

CVE.ORG link : CVE-2026-27024

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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