Security advisory

{
  "id": "1809ecbad7025dffb6d970277f27a750ec37ec0392465e84e1958f2d02e434f9",
  "url": "https://osv.dev/vulnerability/CVE-2021-43667",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-43667",
    "summary": "A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.1.0. This bug can be leveraged by constructing a message whose payload is nil and sending this message with the method 'forwardToLeader'. This bug has been admitted and fixed by the developers of Fabric. If leveraged, any leader node will crash.",
    "evidence": "osv:CVE-2021-43667",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-43667",
      "aliases": [
        "CVE-2021-43667",
        "GHSA-vjj6-5m9f-wqjw"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hyperledger/fabric",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d700b43476e803c864c48021e63a78543b60e17e"
                },
                {
                  "last_affected": "1bdf975374ee93001e5818b3b33089f0be310d93"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:linuxfoundation:fabric:1.4.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0"
                      },
                      {
                        "last_affected": "1.4.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:linuxfoundation:fabric:2.0.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "last_affected": "2.0.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:linuxfoundation:fabric:2.1.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.1.0"
                      },
                      {
                        "last_affected": "2.1.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.4.0",
            "2.0.0",
            "2.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43667.json"
          }
        }
      ],
      "modified": "2026-10-20T10:55:03.030258596Z",
      "provider": "osv",
      "references": [
        "https://github.com/hyperledger/fabric/pull/2844",
        "https://jira.hyperledger.org/browse/FAB-18529"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-43667",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386782,
  "published_at": "2021-11-18T16:15:09.073+00:00"
}