{"id":"GHSA-cpjf-6666-r8fx","revision":null,"records":[{"revision":"9e332b71faf841798958891eb9ccec72","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-61704","aliases":[],"title":"link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897","description":"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.","state":0,"publishedAt":"2026-08-20T16:21:10.45+00:00","modifiedAt":"2026-08-25T15:03:17.04+00:00","affected":[{"ecosystem":"Vendor product","name":"link-preview-js","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"OP-Engineering\",\n                    \"product\": \"link-preview-js\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.0.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-cpjf-6666-r8fx","https://github.com/OP-Engineering/link-preview-js/pull/181","https://github.com/OP-Engineering/link-preview-js/commit/6ee25043dd60b097eb70b4ce049aac94b28239e3","https://github.com/OP-Engineering/link-preview-js/commit/f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12","https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-61704","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-61704","identifiers":["CVE-2026-61704"]},"retained":false,"historicalAffected":[]},{"revision":"a04a71d00fdc4e73be8a33db0afbcded","observedAt":"2026-11-07T13:26:55.176+00:00","statement":{"source":"euvd","id":"EUVD-2026-63439","aliases":["CVE-2026-61704","GHSA-cpjf-6666-r8fx"],"title":"Link Preview JS extracts web links information. 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This issue is fixed in version 4.0.4.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":null}],"references":["https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-cpjf-6666-r8fx","https://github.com/OP-Engineering/link-preview-js/pull/181","https://github.com/OP-Engineering/link-preview-js/commit/6ee25043dd60b097eb70b4ce049aac94b28239e3","https://github.com/OP-Engineering/link-preview-js/commit/f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12","https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.4"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-63439","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Aug 20, 2026, 4:21:10 PM","dateUpdated":"Aug 25, 2026, 3:03:17 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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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.","state":0,"publishedAt":"2026-08-20T17:18:51.94+00:00","modifiedAt":"2026-10-18T20:10:00.11+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/OP-Engineering/link-preview-js/commit/6ee25043dd60b097eb70b4ce049aac94b28239e3","https://github.com/OP-Engineering/link-preview-js/commit/f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12","https://github.com/OP-Engineering/link-preview-js/pull/181","https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.4","https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-cpjf-6666-r8fx"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-61704","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-918"],"productCriteria":[],"sourceDates":{"published":"2026-08-20T17:18:51.940","lastModified":"2026-10-18T20:10:00.110"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-61704","identifiers":["CVE-2026-61704"]},"retained":false,"historicalAffected":[]},{"revision":"a9979ec484e74229a44208dfff2b3fb9","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-cpjf-6666-r8fx","aliases":["CVE-2026-61704"],"title":"link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897","description":"The existing advisory GHSA-4gp8-rjrq-ch6q / CVE-2026-43897 states that the SSRF issue was fixed in 4.0.1. However, 4.0.3 remains bypassable when the documented resolveDNSHost mitigation is used.\n\nRoot cause:\nThe library validates one resolved IP address through resolveDNSHost, but later performs fetch() against the original hostname without pinning the connection to the validated IP. An attacker-controlled DNS server can return a public IP during validation and a loopback/internal IP during the final connection.\n\nImpact:\nThis allows an attacker to bypass the documented SSRF mitigation and make the server-side fetch reach loopback or internal addresses under DNS rebinding conditions.\n\nThis appears to be either an incomplete fix for CVE-2026-43897 or a new DNS rebinding SSRF bypass affecting the latest version.\n\nThe PoC was reproduced in a local-only controlled environment to avoid targeting production or third-party systems. Evidence and reproduction details can be provided privately.","state":0,"publishedAt":"2026-09-02T21:29:57+00:00","modifiedAt":"2026-09-02T21:45:09.8410156+00:00","affected":[{"ecosystem":"npm","name":"link-preview-js","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.0.4"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-cpjf-6666-r8fx","https://nvd.nist.gov/vuln/detail/CVE-2026-61704","https://github.com/OP-Engineering/link-preview-js/pull/181","https://github.com/OP-Engineering/link-preview-js/commit/6ee25043dd60b097eb70b4ce049aac94b28239e3","https://github.com/OP-Engineering/link-preview-js/commit/f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12","https://github.com/OP-Engineering/link-preview-js","https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.4"],"sourceUrl":"https://github.com/advisories/GHSA-cpjf-6666-r8fx","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-cpjf-6666-r8fx","identifiers":["GHSA-cpjf-6666-r8fx","CVE-2026-61704"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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