CVE-2026-109332GHSA-4pvg-m42h-c3x2
Network-AI before 5.15.2 CORS Origin Validation Error in MCP SSE Transport
Jovancoding Network-AI
CVSS
2.3LowExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 15 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.12%Chance of exploitation activity in the next 30 days, higher than 1% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 5.15.2Network-AICVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
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.
Text from CVE List
Affected versions 2
- Network-AIaffected: all versions before 5.15.2CVE List
- Network-AIunaffected: 5.15.2CVE List