CVE-2026-18972

Velociraptor authenticated identity-spoofing vulnerability

Published Aug 11, 2026 CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Workaround

If you have a proxy in front of the Velociraptor GUI server, you can block the \"Grpc-Metadata-USER\" header.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Velociraptor authenticated identity-spoofing vulnerability
First Time appeared Rapid7
Rapid7 velociraptor
Weaknesses CWE-290
CPEs cpe:2.3:a:rapid7:velociraptor:*:*:*:*:*:*:*:*
Vendors & Products Rapid7
Rapid7 velociraptor
References
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
rapid7
Published
Updated
Aug 11, 2026, 1:51 PM
Reserved
Aug 5, 2026, 4:09 PM
Status
Awaiting Analysis
Published
Aug 11, 2026, 1:17 PM
Modified
Oct 23, 2026, 7:10 PM