CVE-2026-103000High· 7.5▾ Twilightpypdf 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 1.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.5%
Last analysed / modified upstream
8.7 → 7.5
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.
pypdf < 6.19.0Upgrade past the affected range:
pypdf 6.19.0Affected packages:
pypdf < 6.19.0Patched in:
pypdf 6.19.0Source: https://github.com/advisories/GHSA-w23x-9jrw-r45c
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-102999High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-102996High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-102998High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-102995High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-102993High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-102997High· 7.5pypdf is a free and open-source pure-python PDF library