{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.3.3"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "04f5bbedee58c538934374dc45182d8fc5926fa3"
            },
            {
              "fixed": "397ac80850bf8d010fae23dd215db0ee2c677306"
            }
          ],
          "repo": "https://github.com/zeromq/libzmq",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "ZeroMQ libzmq 4.3.3 has a heap-based buffer overflow in zmq::tcp_read, a different vulnerability than CVE-2021-20235.",
  "id": "CVE-2020-36400",
  "modified": "2026-03-14T13:51:27.660148763Z",
  "published": "2021-07-01T03:15:07.787Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libzmq/OSV-2020-1887.yaml"
    },
    {
      "type": "FIX",
      "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26042"
    },
    {
      "type": "FIX",
      "url": "https://github.com/zeromq/libzmq/commit/397ac80850bf8d010fae23dd215db0ee2c677306"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}