# CVE-2026-68578: ArcadeDB before 26.7.3 Authentication Bypass via MCP Transport

> Attackers with MCP access can bypass authentication to execute arbitrary code and modify data in ArcadeDB.

- **Severity:** High 7.7 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Aug 2026
- **Updated:** 3 Aug 2026
- **Also known as:** GHSA-6x73-v3rc-f57c, GHSA-hq22-48ph-vqch

## What is CVE-2026-68578?

CVE-2026-68578 is a high-severity authentication bypass vulnerability in ArcadeData arcadedb, published on 2 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

ArcadeDB versions before 26.7.3 fail to bind the authenticated principal in the MCP HTTP transport, causing all engine permission checks to silently pass as no-ops. Non-root MCP-allowed users can perform arbitrary database writes, DDL, schema mutations, and execute arbitrary JavaScript code via the query tool.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-68578?


## How do I fix CVE-2026-68578?

No fix has been published for CVE-2026-68578 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-68578 being exploited?

There is no known exploitation of CVE-2026-68578 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-68578 and fix it if it is affected.

What it is: CVE-2026-68578 is a high-severity authentication bypass vulnerability in ArcadeData arcadedb, published on 2 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-68578 in the wild and no public exploit code.

Affected product: ArcadeData arcadedb. 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-2026-68578/ (Markdown: https://insights.sbomify.com/CVE-2026-68578/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-68578
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68578
- OSV: https://osv.dev/vulnerability/CVE-2026-68578

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-68578/
Summaries are generated and may contain mistakes; the official description above is the record.