CVE-2026-102998High· 7.5▾ 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 41.3 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
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 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.
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-php9-fj8v-98fj
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-2026-102994High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-103000High· 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-2026-102997High· 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