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CVE-2026-43897

Link Preview JS: vunerable to IPv6 and internal loopback attacks

HIGH
8.7
CVSS Score
Published: May 11, 2026 at 09:14 PM UTC
Updated: October 26, 2026 at 12:10 AM UTC
1 product affected across 1 vendorLink Preview Js

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Severity
HIGH8.7
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Link Preview Js· Op Engineering
90%
v < 4.0.1
Affected range stops below 4.0.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

x_refsource_CONFIRM
Source: cverecord
https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-4gp8-rjrq-ch6q
x_refsource_MISC
Source: cverecord
https://github.com/OP-Engineering/link-preview-js/pull/179
x_refsource_MISC
Source: cverecord
https://github.com/OP-Engineering/link-preview-js/commit/4396d48909fab37553c0e93e26447fe218363ede
x_refsource_MISC
Source: cverecord
https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.1

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-918

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