{"id":"CVE-2026-61704","summary":"link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897","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.","aliases":["GHSA-cpjf-6666-r8fx"],"modified":"2026-08-22T03:58:08.285426452Z","published":"2026-08-20T16:21:10.450Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/op-engineering/link-preview-js","events":[{"introduced":"0"},{"fixed":"6ee25043dd60b097eb70b4ce049aac94b28239e3"},{"fixed":"f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12"},{"fixed":"4bb416ddb92288e77812529a05ed8016f08f47f6"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"4.0.4"}]}}],"versions":["4.0.3","4.0.2","4.0.1","4.0.0","3.2.0","3.1.0","3.0.15","3.0.14","3.0.13","3.0.12","3.0.11","3.0.10","3.0.9","3.0.8","3.0.7","3.0.6","3.0.5","3.0.0","2.1.2","2.1.1","v2.0.0","1.6.0","1.5.0","1.4.3","v1.4.0","v1.3.5","1.3.4","v1.3.1","v1.3.0","v1.2.1","V1.2.0","v1.1.2","v1.1.0","v1.0.7","v1.0.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61704.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}