HIGH 8.7 NVD
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 py
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.
References
- https://github.com/py-pdf/pypdf/commit/0d8b5a8832cde1ba308b5c27567b879b7b7eed4a
- https://github.com/py-pdf/pypdf/pull/4096
- https://github.com/py-pdf/pypdf/releases/tag/6.19.0
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-w23x-9jrw-r45c
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-09-30 via NVD.
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