CVE-2026-102994

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that continue for a long time without whitespace can cause pypdf/_reader.py and pypdf/generic/_base.py to scan excessive input through read_until_whitespace, resulting in long runtimes and application unavailability. This issue is fixed in version 6.18.0.

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/82501d2993c6387833c4949d205caeb188f8bb9e	Patch
https://github.com/py-pdf/pypdf/pull/4055	Patch Issue Tracking
https://github.com/py-pdf/pypdf/releases/tag/6.18.0	Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-5jq2-8x83-x246	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

05 Oct 2026, 15:24

Type	Values Removed	Values Added
CPE		cpe:2.3:a:pypdf_project:pypdf::::::::
First Time		Pypdf Project Pypdf Project pypdf
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://github.com/py-pdf/pypdf/commit/82501d2993c6387833c4949d205caeb188f8bb9e -~~	() https://github.com/py-pdf/pypdf/commit/82501d2993c6387833c4949d205caeb188f8bb9e - Patch
References	~~() https://github.com/py-pdf/pypdf/pull/4055 -~~	() https://github.com/py-pdf/pypdf/pull/4055 - Patch, Issue Tracking
References	~~() https://github.com/py-pdf/pypdf/releases/tag/6.18.0 -~~	() https://github.com/py-pdf/pypdf/releases/tag/6.18.0 - Release Notes
References	~~() https://github.com/py-pdf/pypdf/security/advisories/GHSA-5jq2-8x83-x246 -~~	() https://github.com/py-pdf/pypdf/security/advisories/GHSA-5jq2-8x83-x246 - Vendor Advisory

30 Sep 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 20:17

Updated : 2026-10-05 15:24

NVD link : CVE-2026-102994

Mitre link : CVE-2026-102994

CVE.ORG link : CVE-2026-102994

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-407

Inefficient Algorithmic Complexity

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