Security advisory

{
  "id": "5bd44eddc9f0e7b3214f69f7de35f2aea0fc3eb43e0cd308f9db3efc3b0e9643",
  "url": "https://osv.dev/vulnerability/CVE-2021-21296",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-21296",
    "summary": "Fleet is an open source osquery manager. In Fleet before version 3.7.0 a malicious actor with a valid node key can send a badly formatted request that causes the Fleet server to exit, resulting in denial of service. This is possible only while a live query is currently ongoing. We believe the impact of this vulnerability to be low given the requirement that the actor has a valid node key. There is no information disclosure, privilege escalation, or code execution. The issue is fixed in Fleet 3.7.0.",
    "evidence": "osv:CVE-2021-21296",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2021-21296",
      "aliases": [
        "CVE-2021-21296",
        "GHSA-xwh8-9p3f-3x45"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/fleetdm/fleet",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "bb89099511829bf37119122bea4c209a662c1e71"
                },
                {
                  "fixed": "f68f4238e83b45b2164e4ed05df14af0f06eaf40"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.7.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f68f4238e83b45b2164e4ed05df14af0f06eaf40"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.6.0",
            "3.5.1",
            "3.5.0",
            "3.4.0",
            "3.3.0",
            "3.2.0",
            "3.1.0",
            "3.0.0",
            "2.6.0",
            "2.5.0",
            "2.4.0",
            "2.3.0",
            "2.2.0",
            "2.1.2",
            "2.1.1",
            "2.1.0",
            "2.0.2",
            "2.0.1",
            "2.0.0",
            "2.0.0-rc5",
            "2.0.0-rc4",
            "2.0.0-rc3",
            "2.0.0-rc2",
            "2.0.0-rc1",
            "1.0.7",
            "1.0.6",
            "1.0.5",
            "1.0.4",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0.0",
            "1.0.0-rc2",
            "1.0.0-rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21296.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:27.968619835Z",
      "provider": "osv",
      "references": [
        "https://github.com/fleetdm/fleet/security/advisories/GHSA-xwh8-9p3f-3x45",
        "https://www.npmjs.com/package/fleetctl",
        "https://github.com/fleetdm/fleet/commit/f68f4238e83b45b2164e4ed05df14af0f06eaf40"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-21296",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385394,
  "published_at": "2021-02-10T20:15:15.353+00:00"
}