CVE-2026-43897 PUBLISHED

Link Preview JS: vunerable to IPv6 and internal loopback attacks

Assigner: GitHub_M
Reserved: 04.05.2026 Published: 11.05.2026 Updated: 11.05.2026

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.

Metrics

CVSS 4.0

CVSS 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
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	OP-Engineering
Product	link-preview-js
Versions	Version < 4.0.1 is affected

References

Problem Types

CWE-918: Server-Side Request Forgery (SSRF) CWE