CVE-2026-91809
CVSS v3
7.8
HIGH
EPSS Score
0.1 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2026-09-23
- Last Modified
- 2026-09-23
Frequently asked questions
What is CVE-2026-91809?
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.
Is CVE-2026-91809 actively exploited?
Active exploitation of CVE-2026-91809 has not been confirmed. Its EPSS score was 0.1% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-91809?
CVE-2026-91809 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2026-91809 affecting your environment?
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