Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2023-46250 Details

Description

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions 3.7.0 through 3.16.4 can craft a PDF which leads to an infinite loop. This infinite loop blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. That is, for example, the case when the pypdf-user manipulates an incoming malicious PDF e.g. by merging it with another PDF or by adding annotations. The issue was fixed in version 3.17.0. As a workaround, apply the patch manually by modifying `pypdf/generic/_data_structures.py`.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:5.1 MEDIUMVector:CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://github.com/py-pdf/pypdf/commit/9b23ac3c9619492570011d551d521690de9a3e2d	CVE	Patch
https://github.com/py-pdf/pypdf/pull/2264	CVE	Issue TrackingPatch
https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjcc-cq79-p63f	CVE	Vendor Advisory
https://github.com/py-pdf/pypdf/commit/9b23ac3c9619492570011d551d521690de9a3e2d	[email protected]	Patch
https://github.com/py-pdf/pypdf/pull/2264	[email protected]	Issue TrackingPatch
https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjcc-cq79-p63f	[email protected]	Vendor Advisory

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-835	Loop with Unreachable Exit Condition ('Infinite Loop')	[email protected]

Affected Products

Product	Versions
pypdf project pypdf	>= 3.7.0, < 3.17.0
CPE cpe:2.3:a:pypdf_project:pypdf:::::::: Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 8, 2023	Initial Analysis	[email protected]