---
id: CVE-2026-18638
title: "Any authenticated Velociraptor user — including one holding only the\_readerrole — can terminate the entire server process with a single request, by calling\_SetPassword\_with a\_username\_that does not exist."
summary: "Any authenticated Velociraptor user — including one holding only the\_readerrole — can terminate the entire server process with a single request, by calling\_SetPassword\_with a\_username\_that does not exist."
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
  - CWE-703
published: '2026-08-11'
updated: '2026-08-28'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18638'
references:
  - url: 'http://docs.velociraptor.app/announcements/advisories/cve-2026-18638/'
    label: cve@rapid7.com
tags:
  - nvd
epss: 0.00411
epssPercentile: 0.32641
ingestedAt: '2026-08-29T19:41:14.600Z'
---

## Overview

Any authenticated Velociraptor user — including one holding only the readerrole — can terminate the entire server process with a single request, by calling SetPassword with a username that does not exist.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.