{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.22.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6930a20ceb543912cd651b42deae5b9f3637a262"
            }
          ],
          "repo": "https://github.com/litestar-org/litestar",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3qmc-cj7q-62hv"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-644"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48061.json"
  },
  "details": "Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. In versions prior to 2.22.0, an attacker can bypass the allowed hosts validation by omitting the Host header and supplying an X-Forwarded-Host header set to a whitelisted domain. The AllowedHostsMiddleware trusts the X-Forwarded-Host header as a fallback when the Host header is absent. Since X-Forwarded-Host is a client-controllable header, this enables host header injection attacks such as password reset poisoning, cache poisoning, and server-side request routing manipulation. Any application using AllowedHostsConfig is affected when deployed without a reverse proxy that strips X-Forwarded-Host, or when accepting HTTP/1.0 connections. This issue has been fixed in version 2.22.0.",
  "id": "CVE-2026-48061",
  "modified": "2026-08-07T11:31:08.203009136Z",
  "published": "2026-08-03T20:47:34.673Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48061.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/litestar-org/litestar/security/advisories/GHSA-3qmc-cj7q-62hv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48061"
    },
    {
      "type": "FIX",
      "url": "https://github.com/litestar-org/litestar/commit/6930a20ceb543912cd651b42deae5b9f3637a262"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Litestar: AllowedHostsMiddleware bypasses host validation via client-controlled X-Forwarded-Host header"
}