# GHSA-3mjm-x6gw-2x42: @grackle-ai/server has Missing Content-Security-Policy and X-Frame-Options Headers

> The server lacks security headers, reducing defense-in-depth against XSS and clickjacking, requiring an upgrade to add CSP and X-Frame-Options.

- **Severity:** Not scored
- **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:** Yes
- **Published:** 25 Mar 2026

## What is GHSA-3mjm-x6gw-2x42?

GHSA-3mjm-x6gw-2x42 is a missing authorization vulnerability in @grackle-ai/server, published on 25 Mar 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

### Impact

The HTTP server does not set `Content-Security-Policy`, `X-Frame-Options`, or `X-Content-Type-Options` headers on any response. This reduces defense-in-depth against XSS, clickjacking, and MIME-sniffing attacks.

While the current XSS attack surface is small (React-markdown is configured safely, no `dangerouslySetInnerHTML`, Vite does not generate source maps), the absence of these headers means any future XSS vulnerability would have no secondary defense layer.

**Affected code:**
- `packages/server/src/index.ts` — all `res.writeHead()` calls only set `Content-Type`, with no security headers

### Patches

0.70.4

**Fix:** Add security headers to all HTML/API responses:
```typescript
res.writeHead(200, {
  "Content-Type": contentType,
  "Content-Security-Policy": "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:",
  "X-Frame-Options": "DENY",
  "X-Content-Type-Options": "nosniff"
});
```

### Workarounds

Use a reverse proxy (nginx, Caddy) in front of the Grackle server to inject security headers.

### References

- CWE-693: Protection Mechanism Failure
- OWASP: HTTP Security Response Headers
- File: `packages/server/src/index.ts`

## Which versions are affected by GHSA-3mjm-x6gw-2x42?

2 open source packages ship an affected version, including @grackle-ai/server.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@grackle-ai/server` | npm | All versions | 0.70.4 |
| `@grackle-ai/server` | npm | All versions | 0.70.4 |

## How do I fix GHSA-3mjm-x6gw-2x42?

Upgrade @grackle-ai/server to 0.70.4 or later.

## Is GHSA-3mjm-x6gw-2x42 being exploited?

There is no known exploitation of GHSA-3mjm-x6gw-2x42 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-3mjm-x6gw-2x42 and fix it if it is affected.

What it is: GHSA-3mjm-x6gw-2x42 is a missing authorization vulnerability in @grackle-ai/server, published on 25 Mar 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: There is no known exploitation of GHSA-3mjm-x6gw-2x42 in the wild and no public exploit code.

Affected packages and fixed versions:
- @grackle-ai/server (npm): affected all versions; fixed in 0.70.4
- @grackle-ai/server (npm): affected all versions; fixed in 0.70.4

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/GHSA-3mjm-x6gw-2x42/ (Markdown: https://insights.sbomify.com/GHSA-3mjm-x6gw-2x42/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-3mjm-x6gw-2x42

---
From sbomify Insights: https://insights.sbomify.com/GHSA-3mjm-x6gw-2x42/
Summaries are generated and may contain mistakes; the official description above is the record.