CVE-2026-61704: Link preview js Link-preview-js DNS Rebinding SSRF Bypass Vulnerability
HIGHCVE-2026-61704 is a HIGH (CVSS 7.5) link-preview-js dns rebinding ssrf bypass vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Link preview js libraries in the npm ecosystem. The issue involves link-preview-js dns rebinding ssrf bypass / incomplete fix for cve-2026-43897. Remediation is available by upgrading affected packages to version 4.0.4.
CVE-2026-61704 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
How to Fix CVE-2026-61704
To remediate this vulnerability, upgrade all affected Link preview js dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install link-preview-js@4.0.4Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls link-preview-jsHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2026-61704, inspect your project dependencies using npm:
npm ls link-preview-jsAnalyze the terminal output to locate any version of Link preview js in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.0.4), your application is affected.
Note: The npm ls link-preview-js command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Link preview js, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-61704 Affected Link preview js Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
link-preview-js
|
npm |
< 4.0.4
|
4.0.4
|
References
Frequently Asked Questions
What is CVE-2026-61704?
Which Link preview js versions are affected?
What version fixes CVE-2026-61704?
Is link-preview-js affected?
What is the CVSS score of CVE-2026-61704?
What CWE is associated with CVE-2026-61704?
How can I check npm dependencies for CVE-2026-61704?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-cpjf-6666-r8fx",
"modified" : "2026-09-02T21:29:57Z",
"published" : "2026-09-02T21:29:57Z",
"aliases" : [ "CVE-2026-61704" ],
"summary" : "link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897",
"details" : "The existing advisory GHSA-4gp8-rjrq-ch6q / CVE-2026-43897 states that the SSRF issue was fixed in 4.0.1. However, 4.0.3 remains bypassable when the documented resolveDNSHost mitigation is used.\n\nRoot cause:\nThe library validates one resolved IP address through resolveDNSHost, but later performs fetch() against the original hostname without pinning the connection to the validated IP. An attacker-controlled DNS server can return a public IP during validation and a loopback/internal IP during the final connection.\n\nImpact:\nThis allows an attacker to bypass the documented SSRF mitigation and make the server-side fetch reach loopback or internal addresses under DNS rebinding conditions.\n\nThis appears to be either an incomplete fix for CVE-2026-43897 or a new DNS rebinding SSRF bypass affecting the latest version.\n\nThe PoC was reproduced in a local-only controlled environment to avoid targeting production or third-party systems. Evidence and reproduction details can be provided privately.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "link-preview-js"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "4.0.4"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 4.0.3"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-cpjf-6666-r8fx"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-61704"
}, {
"type" : "WEB",
"url" : "https://github.com/OP-Engineering/link-preview-js/pull/181"
}, {
"type" : "WEB",
"url" : "https://github.com/OP-Engineering/link-preview-js/commit/6ee25043dd60b097eb70b4ce049aac94b28239e3"
}, {
"type" : "WEB",
"url" : "https://github.com/OP-Engineering/link-preview-js/commit/f3a3dd84adbb9d32d06a933f44ff3eaa837f9a12"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/OP-Engineering/link-preview-js"
}, {
"type" : "WEB",
"url" : "https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.4"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-918" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-09-02T21:29:57Z",
"nvd_published_at" : "2026-08-20T17:18:51Z"
}
}