What’s Vulnerable › Vulnerabilities

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

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-12 · updated 2026-10-15
• Weakness: CWE-346

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.

Affected products

• Jovancoding Network-AI: before 5.15.2 — fixed in 5.15.2

How to fix

Upgrade to a fixed version: Jovancoding Network-AI 5.15.2. Check the vendor advisory for mitigations.

References

• https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-4pvg-m42h-c3x2
• https://www.vulncheck.com/advisories/network-ai-before-5.15.2-cors-origin-validation-error-in-mcp-sse-transport
• https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-4pvg-m42h-c3x2

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