CVE-2026-86926 FileMaker Server - Remote Code Execution

FileMaker Server contains a heap buffer overflow caused by improper parsing in the database engine block routine, letting attackers execute arbitrary code via crafted .fmp12 files, exploit requires crafted database file.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.13% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
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-122

Vendor fix

Update to version 26.0.3 or later.

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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