CVE-2026-102995

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can place unusually large source-code or destination-string tokens in a font /ToUnicode mapping, causing pypdf/_cmap.py parse_bfchar to decode and retain oversized values during operations such as text extraction and consume excessive memory. This is a second follow-up to earlier /ToUnicode resource-consumption fixes and is limited to the remaining token-length path. 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/319d0b823ce2c311a2435e9fd93c13994d32bb51	Patch
https://github.com/py-pdf/pypdf/pull/4071	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-fp3h-c4fm-7vvf	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

05 Oct 2026, 15:23

Type	Values Removed	Values Added
References	~~() https://github.com/py-pdf/pypdf/commit/319d0b823ce2c311a2435e9fd93c13994d32bb51 -~~	() https://github.com/py-pdf/pypdf/commit/319d0b823ce2c311a2435e9fd93c13994d32bb51 - Patch
References	~~() https://github.com/py-pdf/pypdf/pull/4071 -~~	() https://github.com/py-pdf/pypdf/pull/4071 - 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-fp3h-c4fm-7vvf -~~	() https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3h-c4fm-7vvf - Vendor Advisory
First Time		Pypdf Project Pypdf Project pypdf
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CPE		cpe:2.3:a: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 15:23

NVD link : CVE-2026-102995

Mitre link : CVE-2026-102995

CVE.ORG link : CVE-2026-102995

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-400

Uncontrolled Resource Consumption

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