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

> An attacker can bypass CORS restrictions to read unauthenticated endpoints if the server binds to a non-loopback address.

- **Severity:** Low 2.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-4pvg-m42h-c3x2, GHSA-pfmh-9x5p-7vh5

## What is CVE-2026-109332?

CVE-2026-109332 is a low-severity vulnerability in Jovancoding Network-AI, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### 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.

Weakness: CWE-346 (Origin Validation Error)

## Which versions are affected by CVE-2026-109332?


## How do I fix CVE-2026-109332?

No fix has been published for CVE-2026-109332 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-109332 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109332 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-109332 and fix it if it is affected.

What it is: CVE-2026-109332 is a low-severity vulnerability in Jovancoding Network-AI, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109332 exists.

Affected product: Jovancoding Network-AI. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-109332/ (Markdown: https://insights.sbomify.com/CVE-2026-109332/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-109332
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-109332
- OSV: https://osv.dev/vulnerability/CVE-2026-109332

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-109332/
Summaries are generated and may contain mistakes; the official description above is the record.