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Vulnerability record · CVE-2026-86926 · published 23 September 2026

CVE-2026-86926: Heap-based buffer overflow vulnerability

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.

7.8 CVSS 3.1 High EPSS 0.13% · top 97.9% CWE-122 · Heap-based buffer overflow Undergoing Analysis
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
24 Sep 2026Last modified by NVD

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.

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

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-86926), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.