VulnerabilityAwaiting Analysis

CVE-2026-18636

The Velociraptor gRPC API has a VFSGetBuffer endpoint which allows reading files from the datastore.

MEDIUM 6.8EPSS 0.24%

Does this matter?

Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 6.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
EPSS: 0.24% probability · 15th percentile
CISA KEV: Not listed
Weakness: CWE-288
Source: cve@rapid7.com

References

http://docs.velociraptor.app/announcements/advisories/cve-2026-18636/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.