CVE-2026-43752: filemaker server File Upload RCE — Fix

Description

An authenticated administrator may be able to achieve arbitrary code execution on the host system by uploading a malicious file through the Open Source LLM setup feature in the Admin Console. This vulnerability has been addressed in FileMaker Server 26.0.1.

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CVSS v3.1 Score

4.9

MEDIUM

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

EPSS — Exploit Prediction

0.0029

Probability of exploitation

0.21%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-434 Unrestricted Upload

Affected Products

Vendor	Product	Versions
claris	filemaker_server	< 26.0.1

References

Advisories & Patches

https://community.claris.com/en/s/article/Arbitrary-Code-Execution-Vulnerability-Addressed-in-FileMaker-Server-via-Miniforge-Installer-Upload

Frequently Asked Questions

What is CVE-2026-43752? +

An authenticated administrator may be able to achieve arbitrary code execution on the host system by uploading a malicious file through the Open Source LLM setup feature in the Admin Console. This vulnerability has been addressed in FileMaker Server 26.0.1. It has a CVSS v3.1 base score of 4.9 (MEDIUM).

How severe is CVE-2026-43752? +

CVE-2026-43752 has a CVSS v3.1 score of 4.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0029, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-43752? +

CVE-2026-43752 affects products from claris, specifically: filemaker_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-43752? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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