CVE-2026-103000High· 8.7▾ 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 47.8 · likelihood 0 · 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. The CVSS score shown above comes from the assigning CNA record, not NVD.
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-102999High· 8.7pypdf is a free and open-source pure-python PDF library
CVE-2026-102998High· 8.7pypdf is a free and open-source pure-python PDF library
CVE-2026-102996High· 8.7pypdf is a free and open-source pure-python PDF library
CVE-2026-102997High· 8.7pypdf is a free and open-source pure-python PDF library
CVE-2026-102995High· 8.7pypdf is a free and open-source pure-python PDF library
CVE-2026-102993High· 8.7pypdf is a free and open-source pure-python PDF library