CVE-2026-91804

A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s rendering of Circle annotations with malformed Cloudy appearance streams in specially crafted PDF files. Insufficient validation of the appearance geometry can result in memory corruption and application crashes.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-25)

CWE

CWE-787

Published

2026-09-23

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• foxit:pdf_editor
• foxit:pdf_reader

References

• https://www.foxit.com/support/security-bulletins.html

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