{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.0.4"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6ee25043dd60b097eb70b4ce049aac94b28239e3"
            },
            {
              "fixed": "f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12"
            },
            {
              "fixed": "4bb416ddb92288e77812529a05ed8016f08f47f6"
            }
          ],
          "repo": "https://github.com/op-engineering/link-preview-js",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-cpjf-6666-r8fx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61704.json"
  },
  "details": "Link Preview JS extracts web links information. Prior to 4.0.4, the resolveDNSHost mitigation in index.ts validates one resolved IP address but fetches the original hostname, allowing an attacker-controlled DNS server to return a public address during validation and a loopback or internal address during the final connection. This DNS rebinding condition bypasses the SSRF protection and can cause the server-side preview fetch to reach internal HTTP resources. Redirect handling is affected by the same validation-to-fetch mismatch. This issue is fixed in version 4.0.4.",
  "id": "CVE-2026-61704",
  "modified": "2026-08-22T03:30:54.950725752Z",
  "published": "2026-08-20T16:21:10.450Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61704.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-cpjf-6666-r8fx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-61704"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OP-Engineering/link-preview-js/commit/6ee25043dd60b097eb70b4ce049aac94b28239e3"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OP-Engineering/link-preview-js/commit/f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OP-Engineering/link-preview-js/pull/181"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897"
}