---
id: CVE-2026-61704
title: Link Preview JS extracts web links information
summary: >-
  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 …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-918
vendor: link-preview-js
product: link-preview-js
affected:
  - link-preview-js <= 4.0.3
patched:
  - link-preview-js 4.0.4
published: '2026-08-20'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:09:01.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61704'
references:
  - url: >-
      https://github.com/OP-Engineering/link-preview-js/commit/6ee25043dd60b097eb70b4ce049aac94b28239e3
    label: security-advisories@github.com
  - url: >-
      https://github.com/OP-Engineering/link-preview-js/commit/f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12
    label: security-advisories@github.com
  - url: 'https://github.com/OP-Engineering/link-preview-js/pull/181'
    label: security-advisories@github.com
  - url: 'https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.4'
    label: security-advisories@github.com
  - url: >-
      https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-cpjf-6666-r8fx
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61704'
  - url: 'https://github.com/advisories/GHSA-cpjf-6666-r8fx'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.0055
epssPercentile: 0.43581
aliases:
  - GHSA-cpjf-6666-r8fx
ecosystem: npm
ingestedAt: '2026-09-02T21:51:04.101Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-61704)

Affected packages:

- `link-preview-js <= 4.0.3`

Patched in:

- `link-preview-js 4.0.4`

Source: https://github.com/advisories/GHSA-cpjf-6666-r8fx