NVD HIGH: CVE-2026-103000 — pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a craf...

Wednesday, September 30, 2026 at 09:17 PM UTC·Source: NIST NVD

Updated: Monday, October 5, 2026 at 04:00 PM UTC

Executive Summary

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

Analysis

Indicators of Compromise (1)

CVE (1)

CVE-2026-103000

NVD MITRE CVE

Source Attribution

Originally published by NIST NVD on Sep 30, 2026. Verified by: NIST.

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