CVE-2026-102998High· 8.7▾ Twilightpypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF with form field values can cause pypdf/generic/_appearance_stream.py appearance-stream generation to repeat invariant selection-data work inside a lo…
▾ 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 with form field values can cause pypdf/generic/_appearance_stream.py appearance-stream generation to repeat invariant selection-data work inside a loop when an application updates fields with flattening enabled, resulting in excessive runtimes and application unavailability. 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-2026-103000High· 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