CVE-2026-91805 Foxit PDF Editor/Reader - Use After Free

Foxit PDF Editor/Reader contains a use-after-free vulnerability caused by page-structure changes during rendering in PDF page-tree handling, letting attackers cause memory corruption and application crash, exploit requires crafted PDF.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-416

Vendor fix

Update to the latest version of Foxit PDF Editor/Reader.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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