CVE-2026-18636: medium-severity vulnerability in Rapid7 Velociraptor
Velociraptor VFSGetBuffer API path deny list bypass
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.8epss 0.4%
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/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Affected products
Rapid7 · VelociraptorRelated CVEs — Rapid7 Velociraptor
In the same product, most dangerous first.
CVE-2025-6264MEDIUMVelociraptor priviledge escalation via UpdateConfig artifactEPSS 1.0%CVE-2023-0290MEDIUMRapid7 Velociraptor directory traversal in client ID parameter EPSS 0.8%CVE-2026-19583CRITICALVelociraptor Required Permissions bypass by using client monitoring queriesEPSS 0.6%CVE-2021-3619LOWRapid7 Velociraptor Notebooks Authenticated Persistent XSSEPSS 0.6%CVE-2025-14728MEDIUMRapid7 Velociraptor Directory Traversal VulnerabilityEPSS 0.6%CVE-2023-0242HIGHInsufficient permission check in the VQL copy() functionEPSS 0.6%