# CVE-2026-86938: FileMaker Pro DLL hijacking in installer

Source: https://junglewise.ai/threats/cve-2026-86938-a-dll-hijacking-vulnerability-in-the-filemaker-pro-installer-for  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-23. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-86938 · Severity: high · CVSS 7.3 · Published 2026-09-23

FileMaker Pro is a database application for Windows that allows users to build and manage data-driven solutions. A flaw in the installer permits a local user to place a malicious DLL file in the installer directory, resulting in arbitrary code execution with administrator privileges. An attacker with local access could use this to install malware, steal data, or take complete control of the system.

Vendors: [Claris](https://junglewise.ai/threats/vendors/claris).

## Quick answers

**Is CVE-2026-86938 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86938 being exploited in the wild.

**How severe is CVE-2026-86938?** High severity, with a CVSS score of 7.3, published 23 September 2026.

**Which products and versions are affected?** Claris FileMaker Pro before 26.0.3.

**Is there a fix for CVE-2026-86938?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-86938 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-86938?** Check whether you run Claris FileMaker Pro at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A DLL hijacking vulnerability exists in the FileMaker Pro installer for Windows, where the installer fails to properly validate or isolate DLL dependencies, allowing a local attacker to inject a malicious DLL into the installer directory. The attack requires local file system access and occurs during the installation process. The vulnerability is fixed in FileMaker Pro version 26.0.3.

## Affected products

- Claris FileMaker Pro before 26.0.3

## Timeline

- 2026-09-23: disclosed

## References

- [https://support.claris.com/s/answerview?anum=000049220&language=en_US](https://support.claris.com/s/answerview?anum=000049220&language=en_US)