{"id":"GHSA-cpjf-6666-r8fx","revision":"a9979ec484e74229a44208dfff2b3fb9","records":[{"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":[]}