Detections
Analytics
CVE-2026-61704
high
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.
References
https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-cpjf-6666-r8fx
https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.4
https://github.com/OP-Engineering/link-preview-js/pull/181
https://github.com/OP-Engineering/link-preview-js/commit/f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12
https://github.com/OP-Engineering/link-preview-js/commit/6ee25043dd60b097eb70b4ce049aac94b28239e3