CVE-2026-0663 Denial of Service condition in M-Files Server
An authenticated vault administrator can crash the M-Files Server process by calling a vulnerable API endpoint, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-0663?
CVE-2026-0663 is a medium-severity denial of service vulnerability in M-Files Server, published on 21 Jan 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-1286
Which versions are affected by CVE-2026-0663?
It affects 1 product.
Products include M-Files M-Files Server.
How do I fix CVE-2026-0663?
No fix has been published for CVE-2026-0663 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-0663 being exploited?
There is no known exploitation of CVE-2026-0663 in the wild and no public exploit code.
Other vulnerabilities in M-Files Server
- CVE-2024-10127 Support for authentication bypass condition in M-Files LDAP authentication
- CVE-2025-5964 Path traversal in M-Files API
- CVE-2024-6789 Path traversal in M-Files API
- CVE-2024-4056 Denial of service condition in M-Files Server
- CVE-2023-6912 Brute force vulnerability in M-Files user authentication
Sources
Also known as GHSA-grx8-c238-5vmr.