CVE-2026-102996

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can provide a TrueType or Type1 simple font with an unusually large /Widths array, causing pypdf/_font.py Font._collect_tt_t1_character_widths to process entries beyond the 256 character codes meaningful for a simple font and consume excessive memory during operations such as text extraction. This issue is fixed in version 6.18.1.

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/commit/0fb26eb8cdd01c44b3b2c9fe8329751be2f7cfd5	Patch
https://github.com/py-pdf/pypdf/pull/4072	Patch Issue Tracking
https://github.com/py-pdf/pypdf/releases/tag/6.18.1	Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9cg-prrw-2r8q	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

05 Oct 2026, 15:13

Type	Values Removed	Values Added
CPE		cpe:2.3:a:pypdf_project:pypdf::::::::
References	~~() https://github.com/py-pdf/pypdf/commit/0fb26eb8cdd01c44b3b2c9fe8329751be2f7cfd5 -~~	() https://github.com/py-pdf/pypdf/commit/0fb26eb8cdd01c44b3b2c9fe8329751be2f7cfd5 - Patch
References	~~() https://github.com/py-pdf/pypdf/pull/4072 -~~	() https://github.com/py-pdf/pypdf/pull/4072 - Patch, Issue Tracking
References	~~() https://github.com/py-pdf/pypdf/releases/tag/6.18.1 -~~	() https://github.com/py-pdf/pypdf/releases/tag/6.18.1 - Release Notes
References	~~() https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9cg-prrw-2r8q -~~	() https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9cg-prrw-2r8q - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
First Time		Pypdf Project Pypdf Project pypdf

30 Sep 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 21:17

Updated : 2026-10-05 15:13

NVD link : CVE-2026-102996

Mitre link : CVE-2026-102996

CVE.ORG link : CVE-2026-102996

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-400

Uncontrolled Resource Consumption

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