---
id: CVE-2026-86930
title: >-
  An out-of-bounds read vulnerability in FileMaker Server for Linux allowed an
  attacker uploading a specially crafted image file to a container field to
  disclose process memory during thumbnail generation in FileMaker WebDirect
summary: >-
  An out-of-bounds read vulnerability in FileMaker Server for Linux allowed an
  attacker uploading a specially crafted image file to a container field to
  disclose process memory during thumbnail generation in FileMaker WebDirect.
  This vulne…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cwe:
  - CWE-125
vendor: Claris
product: FileMaker Server
affected:
  - filemaker_server < 26.0.3
published: '2026-09-23'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T15:17:49.620'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86930'
references:
  - url: 'https://support.claris.com/s/answerview?anum=000049218&language=en_US'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-24T14:49:24.290341Z'
ingestedAt: '2026-09-23T17:28:14.861Z'
epss: 0.00139
epssPercentile: 0.02667
---

## Overview

An out-of-bounds read vulnerability in FileMaker Server for Linux allowed an attacker uploading a specially crafted image file to a container field to disclose process memory during thumbnail generation in FileMaker WebDirect. This vulnerability is addressed in FileMaker Server version 26.0.3.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.