Link Preview JS extracts web links information. Prior to 4.0.1, the library did not check for IPv6 loopback attacks. There was also a DNS attack, where an address could be resolved into an internal IP. This could cause internal data leaks. This vulnerability is fixed in 4.0.1.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
OP-Engineering link-preview-js affected
Version Status Constraints
< 4.0.1 affected —

No data.

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Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-4gp8-rjrq-ch6q link-preview-js vulnerable to IPv6 and internal loopback attacks
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/OP-Engineering/link-preview-js/commit/4396d48909fab37553c0e93e26447fe218363ede cve-icon cve-icon
https://github.com/OP-Engineering/link-preview-js/pull/179 cve-icon cve-icon
https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.1 cve-icon cve-icon
https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-4gp8-rjrq-ch6q cve-icon cve-icon
History

Mon, 11 May 2026 22:00:00 +0000

Type Values Removed Values Added
Description Link Preview JS extracts web links information. Prior to 4.0.1, the library did not check for IPv6 loopback attacks. There was also a DNS attack, where an address could be resolved into an internal IP. This could cause internal data leaks. This vulnerability is fixed in 4.0.1.
Title Link Preview JS: vunerable to IPv6 and internal loopback attacks
Weaknesses CWE-918
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-11T21:14:40.495Z

Reserved: 2026-05-04T16:11:33.085Z

Link: CVE-2026-43897

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-11T22:22:14.207

Modified: 2026-05-11T22:22:14.207

Link: CVE-2026-43897

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-12T00:15:07Z

Weaknesses