CVE-2026-86926

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.

CVSS 3.1

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

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

CWE

CWE-122

Published

2026-09-23

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

Affected

• claris:filemaker_server

References

• https://support.claris.com/s/answerview?anum=000049219&language=en_US

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