CVE-2026-18638

Full vulnerability record from the local CVENow database.

Description

Any authenticated Velociraptor user — including one holding only the readerrole — can terminate the entire server process with a single request, by calling SetPassword with a username that does not exist.

Severity

MEDIUM

CVSS score

6.5 (v3.1)

Vulnerability status

Awaiting Analysis

Source identifier

[email protected]

Published

2026-08-11 16:17:30.457000

Last modified

2026-10-23 19:10:00.167000

View original CVE JSON

{
  "id": "CVE-2026-18638",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-11T16:17:30.457",
  "lastModified": "2026-10-23T19:10:00.167",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Any authenticated Velociraptor user — including one holding only the readerrole — can terminate the entire server process with a single request, by calling SetPassword with a username that does not exist."
    },
    {
      "lang": "es",
      "value": "Cualquier usuario autenticado de Velociraptor - incluyendo uno que posea solo el rol de lector - puede terminar todo el proceso del servidor con una única solicitud, al llamar a SetPassword con un nombre de usuario que no existe."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Rapid7",
          "product": "Velociraptor",
          "defaultStatus": "unaffected",
          "repo": "https://github.com/Velocidex/velociraptor/",
          "versions": [
            {
              "version": "0",
              "lessThan": "0.77.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-11T17:15:11.914584Z",
          "id": "CVE-2026-18638",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        },
        {
          "lang": "en",
          "value": "CWE-703"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "http://docs.velociraptor.app/announcements/advisories/cve-2026-18638/",
      "source": "[email protected]"
    }
  ]
}