Apache HTTP Server: SSRF with mod_headers setting Content-Type header

{
  "id": "229e47e1b0413b3c21c2612f319828fbf9db104f8f983543e1ce3e64e361c523",
  "url": "https://osv.dev/vulnerability/CVE-2024-43204",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache HTTP Server: SSRF with mod_headers setting Content-Type header",
    "summary": "SSRF in Apache HTTP Server with mod_proxy loaded allows an attacker to send outbound proxy requests to a URL controlled by the attacker. Requires an unlikely configuration where mod_headers is configured to modify the Content-Type request or response header with a value provided in the HTTP request. Users are recommended to upgrade to version 2.4.64 which fixes this issue.",
    "evidence": "osv:CVE-2024-43204",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-43204",
      "aliases": [
        "BIT-apache-2024-43204",
        "CVE-2024-43204"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/httpd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "da5873e80d6eee7a0838793bf68f1d0254745fbb"
                },
                {
                  "fixed": "7e926454793abd7d71b6afc8bd1ec1648752c6ad"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.4.0"
                      },
                      {
                        "fixed": "2.4.64"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43204.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.407957185Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43204.json",
        "https://httpd.apache.org/security/vulnerabilities_24.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-43204"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.4.0"
                  },
                  {
                    "last_affected": "2.4.63"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43204.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-43204",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499647,
  "published_at": "2025-07-10T16:54:15.759+00:00"
}