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CVE-2026-109332— Network-AI before 5.15.2 CORS Origin Validation Error in MCP SSE Transport

Quick assessment

Affected
Jovancoding Network-AI
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.

Network-AI（npm 包 network-ai）在 5.15.2 版本之前存在一个源验证错误。该问题出现在 lib/mcp-transport-sse.ts 文件中的 McpSseServer._handleRequest 方法中，无论服务器绑定到哪个网络接口，都会将本地主机（localhost）的 Origin 反射到 Access-Control-Allow-Origin 响应头中。当服务器绑定到一个非回环（non-loopback）地址时，攻击者可以构造一个携带 localhost Origin 的恶

CVSS 3.1 · Low

Affected Version Matrix 2

VendorProduct Version RangeStatus
Jovancoding Network-AI < 5.15.2 affected
5.15.2 unaffected
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I. Basic Information for CVE-2026-109332

Vulnerability Information
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Vulnerability Title
Network-AI before 5.15.2 CORS Origin Validation Error in MCP SSE Transport
Source: CVE Program / CVE List V5
Vulnerability Description
Network-AI (npm network-ai) before 5.15.2 contains an origin validation error in McpSseServer._handleRequest in lib/mcp-transport-sse.ts that reflects localhost Origins into Access-Control-Allow-Origin regardless of bind interface. When the server binds a non-loopback address, an attacker page with a localhost Origin visited by a victim can read unauthenticated endpoints like /health cross-origin.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A: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
Jovancoding Network-AI 0 ~ 5.15.2 -

II. Public POCs for CVE-2026-109332

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III. Intelligence Information for CVE-2026-109332

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Vendor Advisories for CVE-2026-109332 (2)

Same Patch Batch · Jovancoding · 2026-10-12 · 3 CVEs total

CVE-2026-109331 7.4 HIGH Network-AI 5.14.0 before 5.15.2 Deny Pattern Bypass via ClaudeHookBridge extractFullTarget
CVE-2026-109330 4.3 MEDIUM Network-AI 5.0.0 before 5.15.2 Cross-Site WebSocket Hijacking via DashboardServer

IV. Related Vulnerabilities

Same product: Network-AI
Same vendor: Jovancoding
Same weakness: CWE-346

V. Comments for CVE-2026-109332

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