CVE-2026-0663: Denial of Service condition in M-Files Server

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-21 · updated 2026-06-17
Weakness: CWE-1286

Description

Denial-of-service vulnerability in M-Files Server versions before 26.1.15632.3 allows an authenticated attacker with vault administrator privileges to crash the M-Files Server process by calling a vulnerable API endpoint.

Affected products

M-Files Corporation M-Files Server: before 26.1.15632.3 — fixed in 26.1.15632.3

How to fix

Upgrade to a fixed version: M-Files Corporation M-Files Server 26.1.15632.3. Check the vendor advisory for mitigations.

References

https://empower.m-files.com/security-advisories/CVE-2026-0663
https://product.m-files.com/security-advisories/cve-2026-0663/

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