# CVE-2026-54076: ArcadeDB: Read-only users can mutate database schema (incomplete fix of CVE-2026-44221)

> Authenticated read-only users can mutate database schema via HTTP endpoints due to missing authorization checks, potentially corrupting stored data.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Sep 2026
- **Updated:** 15 Sep 2026
- **Also known as:** GHSA-vg6x-6pg9-6qwg

## What is CVE-2026-54076?

CVE-2026-54076 is a high-severity missing authorization vulnerability in ArcadeData arcadedb, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

ArcadeDB is a Multi-Model DBMS. Prior to 26.6.1, the fix for CVE-2026-44221 added an UPDATE_SCHEMA authorization check only to LocalDocumentType.createProperty, while the remaining public schema mutators in engine/src/main/java/com/arcadedb/schema/LocalDocumentType.java and engine/src/main/java/com/arcadedb/schema/LocalProperty.java remained unchecked. An authenticated identity, including a read-only API token without UPDATE_SCHEMA permission, can use DROP PROPERTY, ALTER TYPE, or ALTER PROPERTY through the database command/query HTTP endpoints to rename types, change inheritance, alter aliases or buckets, drop properties, and change property constraints. The issue does not directly disclose or write record data, but unauthorized schema mutation can corrupt the meaning of stored records and breach the documented permission model. This issue is fixed in version 26.6.1.

Weakness: CWE-863 (Incorrect Authorization), CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-54076?

2 open source packages ship an affected version, including com.arcadedb:arcadedb-engine.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `com.arcadedb:arcadedb-engine` | Maven | All versions | 26.6.1 |
| `com.arcadedb:arcadedb-engine` | Maven | All versions | 26.6.1 |

## How do I fix CVE-2026-54076?

Upgrade com.arcadedb:arcadedb-engine to 26.6.1 or later.

## Is CVE-2026-54076 being exploited?

There is no known exploitation of CVE-2026-54076 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-54076 and fix it if it is affected.

What it is: CVE-2026-54076 is a high-severity missing authorization vulnerability in ArcadeData arcadedb, published on 15 Sep 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-2026-54076 in the wild and no public exploit code.

Affected packages and fixed versions:
- com.arcadedb:arcadedb-engine (Maven): affected all versions; fixed in 26.6.1
- com.arcadedb:arcadedb-engine (Maven): affected all versions; fixed in 26.6.1

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-2026-54076/ (Markdown: https://insights.sbomify.com/CVE-2026-54076/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-54076
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-54076
- OSV: https://osv.dev/vulnerability/CVE-2026-54076

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-54076/
Summaries are generated and may contain mistakes; the official description above is the record.