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CVE-2026-18825— Origin validation error in the connect-xcors npm package

Quick assessment

Affected
github.com/antono connect-cors
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

connect-xcors npm 包中间件中的来源验证（Origin Validation）错误允许攻击者绕过来源验证机制，从而执行跨域身份验证请求。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-18825

Vulnerability Information
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Vulnerability Title
Origin validation error in the connect-xcors npm package
Source: CVE Program / CVE List V5
Vulnerability Description
An Origin Validation Error in the middleware of the connect-xcors npm package allows an attacker to bypass origin verification and perform a cross domain authenticated request.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
github.com/antono connect-cors 0 ~ 0.5.6 -

II. Public POCs for CVE-2026-18825

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-18825

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Other References for CVE-2026-18825 (1)

IV. Related Vulnerabilities

Same weakness: CWE-346

V. Comments for CVE-2026-18825

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