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CVE-2026-6662— ericc-ch copilot-api Token Endpoint server.ts cors cross-domain policy

Quick assessment

Affected
ericc-ch copilot-api
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.

Copilot API Proxy是Erick Christian个人开发者的一个GitHub Copilot API的逆向代理服务。 Copilot API Proxy 0.7.0及之前版本存在安全漏洞，该漏洞源于组件Token Endpoint的文件src/server.ts中函数cors存在缺陷，可能导致与不受信任域建立宽松的跨域策略。

CVSS 7.3 · High EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-6662

Vulnerability Information
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Vulnerability Title
ericc-ch copilot-api Token Endpoint server.ts cors cross-domain policy
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in ericc-ch copilot-api up to 0.7.0. The impacted element is the function cors of the file src/server.ts of the component Token Endpoint. Performing a manipulation results in permissive cross-domain policy with untrusted domains. It is possible to initiate the attack remotely. The exploit has been made public and could be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
过度许可的跨域白名单
Source: CVE Program / CVE List V5
Vulnerability Title
Copilot API Proxy 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Copilot API Proxy是Erick Christian个人开发者的一个GitHub Copilot API的逆向代理服务。 Copilot API Proxy 0.7.0及之前版本存在安全漏洞，该漏洞源于组件Token Endpoint的文件src/server.ts中函数cors存在缺陷，可能导致与不受信任域建立宽松的跨域策略。
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
ericc-ch copilot-api 0.1 -

II. Public POCs for CVE-2026-6662

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III. Intelligence Information for CVE-2026-6662

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Other References for CVE-2026-6662 (1)

IV. Related Vulnerabilities

Same product: copilot-api
Same vendor: ericc-ch
Same weakness: CWE-942

V. Comments for CVE-2026-6662

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