Resource exhaustion in Py-Pdf Pypdf

CVE-2026-102993

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.

Vulnerability class: DoS (Denial of Service)

Published · last modified .

EPSS exploit prediction

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Affected products

Weakness classification (CWE)

References