Security advisory

{
  "id": "ea11881d69b70f90ee4eb60dc1e1fe05d45728550919eef4d95c421a6dfb6df0",
  "url": "https://osv.dev/vulnerability/CVE-2021-43045",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-43045",
    "summary": "A vulnerability in the .NET SDK of Apache Avro allows an attacker to allocate excessive resources, potentially causing a denial-of-service attack. This issue affects .NET applications using Apache Avro version 1.10.2 and prior versions. Users should update to version 1.11.0 which addresses this issue.",
    "evidence": "osv:CVE-2021-43045",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-43045",
      "aliases": [
        "CVE-2021-43045",
        "GHSA-868x-rg4c-cjqg"
      ],
      "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/apache/avro",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4e1fefca493029ace961b7ef8889a3722458565a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:avro:*:*:*:*:*:.net:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.11.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "release-1.11.0-rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43045.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:18.601653135Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread/5fttw9vk6gd2p3b846nox7hcj5469xfd"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-43045",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429813,
  "published_at": "2022-01-06T18:15:07.863+00:00"
}