CVE-2026-18638 — MEDIUM (6.5)

Vulnerability Description

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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-703 CWE-476

References

http://docs.velociraptor.app/announcements/advisories/cve-2026-18638/

FAQ

What is CVE-2026-18638?

CVE-2026-18638 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ex...

How severe is CVE-2026-18638?

CVE-2026-18638 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18638?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.