CVE-2026-43897

HIGH

Link Preview JS: vunerable to IPv6 and internal loopback attacks

Title source: cna
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v4 8.7
EPSS 0.0005
EPSS Percentile 16.9%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-918
Status published
Products (2)
npm/link-preview-js 0 - 4.0.1npm
OP-Engineering/link-preview-js < 4.0.1
Published May 11, 2026
Tracked Since May 12, 2026