CVE-2026-61704
CVE-2026-61704 · link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.5 · High · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
link-preview-js
- Versions
- < 4.0.4: Affected
No fix published
link-preview-js npm
- Affected ranges
- SEMVER: < 4.0.4
Update to 4.0.4
Original sources
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2026-61704