# CVE-2026-78411: Velociraptor server metadata privilege escalation via SetClientMetadata

Source: https://junglewise.ai/threats/cve-2026-78411-velociraptor-s-setclientmetadata-used-the-wrong-permission-check  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-05. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-78411 · Severity: medium · CVSS 6.5 · Published 2026-10-05

Velociraptor is a digital forensics and incident response platform used to collect data from endpoints. A permission check error in the SetClientMetadata function allows users with basic client-management permissions to modify sensitive server-wide configuration data that should only be accessible to administrators. This could lead to unauthorized configuration changes and platform compromise.

Vendors: [Velociraptor](https://junglewise.ai/threats/vendors/velociraptor).

## Quick answers

**Is CVE-2026-78411 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-78411 being exploited in the wild.

**How severe is CVE-2026-78411?** Medium severity, with a CVSS score of 6.5, published 5 October 2026.

**Which products and versions are affected?** Velociraptor before 0.77.3.

**Is there a fix for CVE-2026-78411?** Yes: fixed in 0.77.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-78411 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-78411?** Check whether you run Velociraptor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 0.77.3

## Technical details

The SetClientMetadata RPC endpoint performs an insufficient permission check, allowing users with LABEL_CLIENTS permission to write to server metadata rather than enforcing an admin-only restriction. Server metadata typically stores site-wide configuration, and the vulnerability permits unauthorized elevation of privilege through a permissions bypass on a metadata update API call.

## Affected products

- Velociraptor Velociraptor before 0.77.3

## Timeline

- 2026-10-05: disclosed

## References

- [http://docs.velociraptor.app/announcements/advisories/cve-2026-78411](http://docs.velociraptor.app/announcements/advisories/cve-2026-78411)

## Related threats

- [Velociraptor WatchEvent API org isolation bypass](https://junglewise.ai/threats/cve-2026-78412-velociraptor-s-watchevent-grpc-api-can-specify-the-orgid-of-the)