Security advisory

{
  "id": "6cb66f669e4233e5e6787c62ed522ed863015cda34ff48bca380ee2f4332690c",
  "url": "https://osv.dev/vulnerability/CVE-2021-45115",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-45115",
    "summary": "An issue was discovered in Django 2.2 before 2.2.26, 3.2 before 3.2.11, and 4.0 before 4.0.1. UserAttributeSimilarityValidator incurred significant overhead in evaluating a submitted password that was artificially large in relation to the comparison values. In a situation where access to user registration was unrestricted, this provided a potential vector for a denial-of-service attack.",
    "evidence": "osv:CVE-2021-45115",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-45115",
      "aliases": [
        "BIT-django-2021-45115",
        "CVE-2021-45115",
        "GHSA-53qw-q765-4fww",
        "PYSEC-2022-1"
      ],
      "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/django/django",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2a62cdcfec85938f40abb2e9e6a9ff497e02afe8"
                },
                {
                  "fixed": "44e7cca62382f2535ed0f5d2842b433f0bd23a57"
                },
                {
                  "introduced": "3591e1c1acbd7c13174275367c3fdf012cb0413b"
                },
                {
                  "fixed": "6e499a28ac6ec10c2f0f77b92cab49fb8f8df419"
                },
                {
                  "introduced": "ef62a3a68c9d558486145a42c0d71ea9a76add9e"
                },
                {
                  "fixed": "27a64da8213f27787ae1c48041a70f197cdcfd6f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.2"
                      },
                      {
                        "fixed": "2.2.26"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.2"
                      },
                      {
                        "fixed": "3.2.11"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0"
                      },
                      {
                        "fixed": "4.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-45115.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:41.436575486Z",
      "provider": "osv",
      "references": [
        "https://groups.google.com/forum/#%21forum/django-announce",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/",
        "https://security.netapp.com/advisory/ntap-20220121-0005/",
        "https://docs.djangoproject.com/en/4.0/releases/security/",
        "https://www.djangoproject.com/weblog/2022/jan/04/security-releases/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "35"
                  },
                  {
                    "last_affected": "35"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-45115",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 435149,
  "published_at": "2022-01-05T00:15:07.907+00:00"
}