CVE-2026-109332
Network-AI before 5.15.2 CORS Origin Validation Error in MCP SSE Transport
- State
- Published
- Severity
- 2.3 Low
- Published
- Oct 12, 2026
- Updated
- Oct 15, 2026
- Reserved
- Oct 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.3 Low | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 3.1 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-346 Origin Validation Error
Affected Products
| Product | Versions |
|---|---|
Network-AIJovancoding |
|
References
- GitHub Security Advisory (GHSA-4pvg-m42h-c3x2)vendor-advisory
- VulnCheck Advisory: Network-AI before 5.15.2 CORS Origin Validation Error in MCP SSE Transportthird-party-advisory
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