Answer in brief
CVE-2026-61704 records a High severity (CVSS 7.5) vulnerability in link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897. The current sources do not mark it as known exploited. The current feed maps OP-Engineering/link-preview-js (generic), link-preview-js (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps OP-Engineering/link-preview-js (generic), link-preview-js (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| OP-Engineering/link-preview-jsgeneric | <4.0.4 | 4.0.4 |
| link-preview-jsnpm | <=4.0.3 | 4.0.4 |
Published upstream
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 20, 2026
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.
Quoted source text, attributed separately from HOL analysis.