Security advisory

{
  "id": "1ee5235002dd6ec5b9191f14c0ae664dd0b6f3d02f8c2daac7d8bc513235a35b",
  "url": "https://osv.dev/vulnerability/CVE-2023-23969",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2023-23969",
    "summary": "In Django 3.2 before 3.2.17, 4.0 before 4.0.9, and 4.1 before 4.1.6, the parsed values of Accept-Language headers are cached in order to avoid repetitive parsing. This leads to a potential denial-of-service vector via excessive memory usage if the raw value of Accept-Language headers is very large.",
    "evidence": "osv:CVE-2023-23969",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-23969",
      "aliases": [
        "BIT-django-2023-23969",
        "CVE-2023-23969",
        "GHSA-q2jf-h9jm-m7p4",
        "PYSEC-2023-12"
      ],
      "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": "3591e1c1acbd7c13174275367c3fdf012cb0413b"
                },
                {
                  "fixed": "aed1bb56d118937d5d6f3ec72f170779dd8c74cd"
                },
                {
                  "introduced": "ef62a3a68c9d558486145a42c0d71ea9a76add9e"
                },
                {
                  "fixed": "ca891ef44b27eb93890846615e0121037e6c8a35"
                },
                {
                  "introduced": "9fee86e44dd83dc968ec443adcde191b3eba1286"
                },
                {
                  "fixed": "f4909f7f7e5220e5a7eb9119beb959577263c63d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.2"
                      },
                      {
                        "fixed": "3.2.17"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0"
                      },
                      {
                        "fixed": "4.0.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.1"
                      },
                      {
                        "fixed": "4.1.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-23969.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.500857796Z",
      "provider": "osv",
      "references": [
        "https://docs.djangoproject.com/en/4.1/releases/security/",
        "https://groups.google.com/forum/#%21forum/django-announce",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23969.json",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWY6DQWRVBALV73BPUVBXC3QIYUM24IK/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LTZVAKU5ALQWOKFTPISE257VCVIYGFQI/",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-23969",
        "https://security.netapp.com/advisory/ntap-20230302-0007/",
        "https://lists.debian.org/debian-lts-announce/2023/02/msg00000.html",
        "https://www.djangoproject.com/weblog/2023/feb/01/security-releases/"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23969.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-23969",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497696,
  "published_at": "2023-02-01T00:00:00+00:00"
}