Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

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

Low 3.1

In plain English

A low-severity security flaw in Network-AI from Jovancoding. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)3.1Low

Exploit odds (30 days)0.1%top 96.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Jovancoding	Network-AI	0 – before 5.15.2

Weakness: CWE-346 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

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 Transport third-party-advisory