{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.0.2"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7db2f606dfd720d69ad54ff896bd6e7236d9d15e"
            }
          ],
          "repo": "https://github.com/i18next/i18next-http-backend",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-xvq9-wjp8-hwqf"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-74",
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105800.json"
  },
  "details": "i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.2, attacker-controlled language or namespace values interpolated into a custom loadPath or addPath that begins directly with {{lng}} or {{ns}} can make colon-based input become an absolute URL or, in browsers, make a double-slash namespace become a protocol-relative URL. The resulting request can leave the intended origin and cause URL injection or server-side request forgery. The default /locales/{{lng}}/{{ns}}.json template and templates with a leading path or origin are not affected because the placeholder does not occupy the URL's structural beginning. This issue is fixed in version 4.0.2.",
  "id": "CVE-2026-105800",
  "modified": "2026-10-07T02:30:59.465367663Z",
  "published": "2026-10-06T14:48:05.267Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105800.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/i18next/i18next-http-backend/commit/07e028862b25d0b9251bf3cafb92be2d35285f85"
    },
    {
      "type": "WEB",
      "url": "https://github.com/i18next/i18next-http-backend/releases/tag/v4.0.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-xvq9-wjp8-hwqf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105800"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "i18next-http-backend incomplete URL validation permits SSRF"
}