CVE-2026-43897

Link Preview JS: vunerable to IPv6 and internal loopback attacks

Published May 11, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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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
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Op-engineering
Op-engineering link-preview-js
Vendors & Products Op-engineering
Op-engineering link-preview-js
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 12, 2026, 4:40 PM
Reserved
May 4, 2026, 4:11 PM
Status
Deferred
Published
May 11, 2026, 10:22 PM
Modified
Oct 26, 2026, 12:10 AM