CVE-2026-33699

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/py-pdf/pypdf/pull/3693	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.9.2	Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-03-27 01:16

Updated : 2026-06-17 10:37

NVD link : CVE-2026-33699

Mitre link : CVE-2026-33699

CVE.ORG link : CVE-2026-33699

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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