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.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.004 (25.8th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-18972: fell from 0.061 to 0.004.

EPSS over last 30 days · oldest: 0.061 · newest: 0.004 · change: -0.057

Affected products

Weakness classification (CWE)

References

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.