{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.6.10"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "804f2af1002b9608a8a2994233583eaf22ad45ba"
            }
          ],
          "repo": "https://github.com/fluent/fluent-bit",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "Fluent Bit 1.6.10 has a NULL pointer dereference when an flb_malloc return value is not validated by flb_avro.c or http_server/api/v1/metrics.c.",
  "id": "CVE-2021-27186",
  "modified": "2026-03-13T21:50:35.833940564Z",
  "published": "2021-02-10T22:15:13.877Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/fluent/fluent-bit/pull/3045"
    },
    {
      "type": "FIX",
      "url": "https://github.com/fluent/fluent-bit/pull/3047"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/fluent/fluent-bit/issues/3044"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}