{"schemaVersion":3,"id":"CVE-2026-18636","aliases":[],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-08-11T14:40:12.322Z","modified":"2026-08-11T19:43:56.379Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.8,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.8,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.8,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.004,"percentile":0.33067,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0.164,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.00236},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.004,"percentile":0.33067}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.004,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.004,"percentile":0.33067}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-288","name":"Authentication Bypass Using an Alternate Path or Channel","description":"The product requires authentication, but the product has an alternate path or channel that does not require authentication.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/288.html"}],"affected":[{"vendor":"rapid7","product":"velociraptor","name":"velociraptor","label":"velociraptor","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.77.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.77.2","eol":null,"hubHref":"/vendor/rapid7/velociraptor"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://docs.velociraptor.app/announcements/advisories/cve-2026-18636/","label":"docs.velociraptor.app/announcements/advisories/cve-2026-18636/","hostname":"docs.velociraptor.app","tags":[]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:12070-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:12070-1"]},"timeline":[{"kind":"published","date":"2026-08-11T14:40:12.322Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-11T19:43:56.379Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":27,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T15:43:30.277Z","stale":false,"partial":false}}