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Vulnerability · Published Aug 20, 2026 · Assigned by GitHub_M

CVE-2026-61704link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897

High 7.5

In plain English

A high-severity server-side request forgery in link-preview-js from OP-Engineering. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 53.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmlink-preview-js4.0.4GHSA-cpjf-6666-r8fx

Affected products (as reported)

VendorProductVersions
OP-Engineering link-preview-js < 4.0.4

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References