CVE-2026-102993

High

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.17.0, a crafted PDF can provide unusually large Roman page-label values that cause pypdf/_page_labels.py to generate excessively large numeral strings when an application retrieves document page labels, consuming large amounts of memory and potentially making the application unavailable. This issue is fixed in version 6.17.0.

SeverityHigh

CVSS7.5

Exploit probability—

ProductPypdf

PublishedSep 30, 2026

First seenSep 30, 2026

Weakness typeCWE-400Uncontrolled resource consumption CWE-770Allocation of resources without limits

How to fix

Update

pypdf_project pypdf6.17.0 or later
pypdf6.17.0 or later
py-pdf pypdf6.17.0 or later

Affected products

Product	Affected versions	Fixed in
pypdf_project pypdf	v < 6.17.0	6.17.0
pypdfPyPI	v < 6.17.0	6.17.0
py-pdf pypdf	v < 6.17.0	6.17.0

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