CVE-2026-18636: RAPID7 Velociraptor

Medium severity, CVSS 6.8. EPSS: 0.4% chance of exploitation in the next 30 days.

The Velociraptor gRPC API has a VFSGetBuffer endpoint which allows reading files from the datastore. To prevent users from reading sensitive files or accessing other orgs, the requested path is prefix checked against a list of denied prefixes. This prefix check can be bypassed allowing a user to access usually denied files. If the user has read permission in the ROOT org, this allows access to other orgs, in which the user may not have permission.

Affected products

• RAPID7 Velociraptor: before 0.77.2 (fixed in 0.77.2)

Published 2026-08-11. Last modified 2026-08-28.