CVE-2026-91807: Foxit Software Inc Foxit PDF Editor

Medium severity, CVSS 6.1. EPSS: 0.1% chance of exploitation in the next 30 days.

A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of malformed image soft-mask data. Insufficient validation of the soft-mask data attribute during image parsing may cause an arithmetic underflow, resulting in an out-of-bounds read and application crash.

Affected products

• Foxit Software Inc Foxit PDF Editor: up to and including 2026.2; up to and including 14.0.7; up to and including 13.2.6
• Foxit Software Inc Foxit PDF Reader: up to and including 2026.2

Published 2026-09-23. Last modified 2026-09-23.