CVE-2026-91814: Foxit Software Inc Foxit PDF Editor

Medium severity, CVSS 5.3. EPSS: 0.1% chance of exploitation in the next 30 days.

A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.

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.