CVE-2026-5939 PUBLISHED

UAF in Foxit PDF Editor/Reader via XFA calculate event

Assigner: Foxit
Reserved: 09.04.2026 Published: 27.04.2026 Updated: 28.04.2026

A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS Score: 5.5

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	Required	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Foxit Software Inc.
Product	Foxit PDF Editor
Versions	Default: unaffected Version Versions 2026.1 and earlier is affected Version Versions 14.0.3 and earlier is affected

Vendor	Foxit Software Inc.
Product	Foxit PDF Reader
Versions	Default: unaffected Version Versions 2026.1 and earlier is affected

Credits

Haein Lee from KAIST Hacking Lab finder

References

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

Problem Types

CWE-416 Use after free CWE

Impacts

Potential arbitrary code execution