CVE-2026-18636
Medium
Description
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.
SeverityMedium
CVSS6.8
Exploit probability—
ProductVelociraptor
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-288CWE-288
How to fix
Update
- Rapid7 Velociraptor0.77.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Rapid7 Velociraptor | v < 0.77.2 | 0.77.2 |
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