Is CVE-2026-91809 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-91809?

CVE-2026-91809 has a CVSS v3 severity of HIGH (7.8).

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CVE-2026-91809

Description

A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of malformed PDF form fields. Improper validation during field-name traversal may cause the application to access a released object, resulting in an application crash.