CVE-2026-86926
High
Description
A heap buffer overflow vulnerability in the FileMaker Server database engine block parsing routine allowed a maliciously crafted .fmp12 database file to cause memory corruption, potentially leading to arbitrary code execution. This vulnerability is addressed in FileMaker Server version 26.0.3.
SeverityHigh
CVSS7.8
Exploit probability—
ProductClaris Filemaker Server
PublishedSep 23, 2026
First seenSep 23, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- claris filemaker_server26.0.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| claris filemaker_server | v < 26.0.3 | 26.0.3 |
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