Security advisory

{
  "id": "6abcdc9c54671140c717e34ba48fe4d8428eea51c762b53fb5a24b4bd0126307",
  "url": "https://osv.dev/vulnerability/CVE-2024-21520",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2024-21520",
    "summary": "Versions of the package djangorestframework before 3.15.2 are vulnerable to Cross-site Scripting (XSS) via the break_long_headers template filter due to improper input sanitization before splitting and joining with tags.",
    "evidence": "osv:CVE-2024-21520",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2024-21520",
      "aliases": [
        "CVE-2024-21520",
        "GHSA-gw84-84pc-xp82",
        "PYSEC-2026-1304"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/encode/django-rest-framework",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c7a7eae551528b6887614df816c8a26df70272d6"
                },
                {
                  "fixed": "3b41f0124194430da957b119712978fa2266b642"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.15.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3b41f0124194430da957b119712978fa2266b642"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.15.1",
            "3.15.0",
            "3.14.0",
            "3.13.1",
            "3.13.0",
            "3.12.4",
            "3.12.3",
            "3.12.1",
            "3.12.0",
            "3.11.0",
            "3.10.3",
            "3.10.2",
            "3.10.1",
            "3.10.0",
            "3.9.3",
            "3.9.2",
            "3.9.1",
            "3.8.2",
            "3.8.1",
            "3.8.0",
            "3.7.7",
            "3.7.6",
            "3.7.5",
            "3.7.4",
            "3.7.3",
            "3.7.2",
            "3.7.1",
            "3.7.0",
            "3.6.4",
            "3.6.3",
            "3.6.2",
            "3.6.1",
            "3.6.0",
            "3.5.4",
            "3.5.3",
            "3.5.2",
            "3.5.1",
            "3.5.0",
            "3.4.7",
            "3.4.6",
            "3.4.5",
            "3.4.4",
            "3.4.3",
            "3.4.2",
            "3.4.1",
            "3.4.0",
            "3.3.2",
            "3.3.1",
            "3.2.4",
            "3.2.3",
            "3.2.2",
            "3.2.1",
            "3.2.0",
            "3.1.3",
            "3.1.2",
            "3.1.1",
            "3.1.0",
            "3.0.5",
            "3.0.3",
            "3.0.4",
            "3.0.2",
            "3.0.1",
            "3.0.0",
            "2.4.4",
            "2.4.3",
            "2.4.2",
            "2.4.1",
            "2.4.0",
            "2.3.14",
            "2.3.13",
            "2.3.12",
            "2.3.11",
            "2.3.10",
            "2.3.9",
            "2.3.8",
            "2.3.7",
            "2.3.6",
            "2.3.5",
            "2.3.4",
            "2.3.3",
            "2.3.2",
            "2.3.1",
            "2.3.0",
            "2.2.7",
            "2.2.6",
            "2.2.4",
            "2.2.3",
            "2.2.2",
            "2.2.1",
            "2.2.0",
            "2.1.17",
            "2.1.16",
            "2.1.15",
            "2.1.14",
            "2.1.13",
            "2.1.12",
            "2.1.11",
            "2.1.10",
            "2.1.9",
            "2.1.8",
            "2.1.7",
            "2.1.6",
            "2.1.5",
            "2.1.4",
            "2.1.3",
            "2.1.2",
            "2.1.1",
            "2.1.0",
            "2.0.2",
            "2.0.1",
            "2.0.0",
            "0.4.0",
            "0.3.3",
            "0.3.2",
            "0.3.1",
            "0.2.4",
            "0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-21520.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.914632091Z",
      "provider": "osv",
      "references": [
        "https://github.com/encode/django-rest-framework/compare/3.15.1...3.15.2",
        "https://security.snyk.io/vuln/SNYK-PYTHON-DJANGORESTFRAMEWORK-7252137",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21520.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-21520",
        "https://github.com/encode/django-rest-framework/commit/3b41f0124194430da957b119712978fa2266b642",
        "https://github.com/encode/django-rest-framework/pull/9435"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "snyk",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21520.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-21520",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519273,
  "published_at": "2024-06-26T05:00:02.49+00:00"
}