What is CVE-2026-18972?

CVE-2026-18972 is a critical-severity vulnerability in Rapid7 Velociraptor, classified under Authentication Bypass by Spoofing. CVSS score: 9.6/10. Published 2026-08-11.

How severe is CVE-2026-18972?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Rapid7 Velociraptor

CVE-2026-18972

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.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.

Affected products

Rapid7 Velociraptor — versions 0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

cve@rapid7.com

Frequently asked questions

What is CVE-2026-18972?: CVE-2026-18972 is a critical-severity vulnerability in Rapid7 Velociraptor, classified under Authentication Bypass by Spoofing. CVSS score: 9.6/10. Published 2026-08-11.
How severe is CVE-2026-18972?: Critical severity. CVSS v3 base score is 9.6 out of 10.