CVE-2026-18972: Velociraptor authenticated identity-spoofing vulnerability
Published on 2026-07-31
Vulnogram
CVSS · CRITICAL · 9.6 ⁄10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Scoring scenario:
GENERAL
attackVector:
NETWORK
attackComplexity:
LOW
privilegesRequired:
LOW
userInteraction:
NONE
scope:
CHANGED
confidentialityImpact:
HIGH
integrityImpact:
HIGH
availabilityImpact:
NONE
Description
An authenticated attacker can spoof another GUI user's identity by sending their request with the custom header "Grpc-Metadata-USER". This can lead to an account takeover attack from a user with low privileges to administrator.
Problem
CWE-290 Authentication bypass by spoofing
Required configuration for exposure
The attacker must have access to the Velociraptor GUI with at least the "reader" role.
Workarounds
If you have a proxy in front of the Velociraptor GUI server, you can block the "Grpc-Metadata-USER" header.
| Product | Affected |
|---|---|
| Rapid7 Velociraptor on
Linux
source repo Default status is unaffected |
before 0.77.2 |
Credits
- Yuval Miller
- Leon Kayaliev