CVE-2026-102994
pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that continue for a long time without whitespace can cause pypdf/_reader.py and pypdf/generic/_base.py to scan excessive input through read_until_whitespace, resulting in long runtimes and application unavailability. This issue is fixed in version 6.18.0.
- Published Sep 30, 2026
- CVSS 8.7 high
- 0.3% chance of exploitation in the next 30 days (EPSS)
- A fix is available