---
title: "CVE-2026-86930: FileMaker Server - Out of Bounds Read"
description: "FileMaker Server for Linux contains an out-of-bounds read vulnerability caused by processing specially crafted image files in container fields during thumbnail generation in FileMaker WebDirect, letting attackers disclose process memory, exploit requires uploading a crafted image file."
url: https://panop.io/threat-heartbeat/CVE-2026-86930/
---

# CVE-2026-86930 FileMaker Server - Out of Bounds Read

FileMaker Server for Linux contains an out-of-bounds read vulnerability caused by processing specially crafted image files in container fields during thumbnail generation in FileMaker WebDirect, letting attackers disclose process memory, exploit requires uploading a crafted image file.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.29% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-86930)

## Details

Type

Out of Bounds Read

Impact

Information Disclosure

CVSS vector

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

Published

23 September 2026

Updated

15 October 2026

Weakness

[CWE-125](https://cwe.mitre.org/data/definitions/125.html)

## Vendor fix

Update to FileMaker Server 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-86930](https://nvd.nist.gov/vuln/detail/CVE-2026-86930)
- [https://support.claris.com/s/answerview?anum=000049218&language=en\_US](https://support.claris.com/s/answerview?anum=000049218&language=en_US)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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