Auth bypass in Claris Filemaker Pro

CVE-2026-86938

A DLL hijacking vulnerability in the FileMaker Pro installer for Windows allowed a local user to execute arbitrary code with elevated administrator privileges by placing a malicious DLL file in the installer directory. This vulnerability is addressed in FileMaker Pro version 26.0.3.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (0.8th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-86938: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-86938?
CVE-2026-86938 is a high-severity vulnerability in Claris Filemaker Pro, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.3/10. Published 2026-09-23.
How severe is CVE-2026-86938?
High severity. CVSS v3 base score is 7.3 out of 10.