CVE-2026-18638 PUBLISHED

Velociraptor server crash via the SetPassword API

Assigner: rapid7
Reserved: 03.08.2026 Published: 11.08.2026 Updated: 11.08.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 6.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Rapid7
Product	Velociraptor
Versions	Default: unaffected affected from 0 to 0.77.2 (excl.)

Affected Configurations

The user must have at least reader permissions to the org before they can call the SetPassword API.

Credits

Mayank Rajput (https://github.com/hackelite01) finder

References

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

Problem Types

CWE-476 NULL pointer dereference CWE
CWE-703 Improper Check or Handling of Exceptional Conditions CWE

Impacts

CAPEC-153 Input Data Manipulation