Resource exhaustion in Py-Pdf Pypdf

CVE-2026-103000

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF can provide unusually large alphabetical page-label values that cause pypdf/_page_labels.py to generate strings beyond a reasonable page-label length when an application retrieves document page labels, consuming excessive memory and potentially making the application unavailable. This issue is fixed in version 6.19.0.

Vulnerability class: DoS (Denial of Service)

Published · last modified .

EPSS exploit prediction

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Affected products

Weakness classification (CWE)

References