Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-61704— link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897

Quick assessment

Affected
OP-Engineering link-preview-js
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

op-engineering Link Preview JS是op-engineering组织的一款软件开发行业中用于生成网页链接预览的中间件。 op-engineering Link Preview JS 4.0.4之前版本存在服务端请求伪造漏洞，该漏洞源于index.ts中的resolveDNSHost缓解措施验证一个解析的IP地址但获取原始主机名，导致DNS重绑定绕过SSRF保护，可能使服务器端预览获取访问内部HTTP资源。

CVSS 7.5 · High EPSS 0.55% · P44

Affected Version Matrix 1

VendorProduct Version RangeStatus
OP-Engineering link-preview-js < 4.0.4 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-61704

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
link-preview-js DNS Rebinding SSRF Bypass / Incomplete Fix for CVE-2026-43897
Source: CVE Program / CVE List V5
Vulnerability Description
Link Preview JS extracts web links information. Prior to 4.0.4, the resolveDNSHost mitigation in index.ts validates one resolved IP address but fetches the original hostname, allowing an attacker-controlled DNS server to return a public address during validation and a loopback or internal address during the final connection. This DNS rebinding condition bypasses the SSRF protection and can cause the server-side preview fetch to reach internal HTTP resources. Redirect handling is affected by the same validation-to-fetch mismatch. This issue is fixed in version 4.0.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
op-engineering Link Preview JS 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
op-engineering Link Preview JS是op-engineering组织的一款软件开发行业中用于生成网页链接预览的中间件。 op-engineering Link Preview JS 4.0.4之前版本存在服务端请求伪造漏洞，该漏洞源于index.ts中的resolveDNSHost缓解措施验证一个解析的IP地址但获取原始主机名，导致DNS重绑定绕过SSRF保护，可能使服务器端预览获取访问内部HTTP资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OP-Engineering link-preview-js < 4.0.4 -

II. Public POCs for CVE-2026-61704

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9679 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-61704

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-61704 (3)

Vendor Advisories for CVE-2026-61704 (1)

Vendor Pages for CVE-2026-61704 (1)

IV. Related Vulnerabilities

Same product: link-preview-js
Same vendor: OP-Engineering
Same weakness: CWE-918

V. Comments for CVE-2026-61704

No comments yet

Leave a comment