# CVE-2026-93594: ArcadeDB before 26.9.1 ACL Bypass via Index and TimeSeries

> Authenticated users can bypass access controls to read or delete indexed data and TimeSeries samples in ArcadeDB via SQL queries.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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:** 18 Sep 2026
- **Updated:** 18 Sep 2026
- **Also known as:** GHSA-2c8m-q484-jv7m, GHSA-34w2-f24j-55hj

## What is CVE-2026-93594?

CVE-2026-93594 is a high-severity missing authorization vulnerability in ArcadeData arcadedb, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

ArcadeDB (Maven artifact com.arcadedb:arcadedb-engine) through 26.8.1 enforces its per-type/per-record access-control rules only in LocalBucket, keyed on file id. Query-execution paths that reach record data through LSM index files or the TimeSeries engine never invoke that permission check, so an authenticated user who is denied readRecord/deleteRecord on a type can still, with a single ordinary SQL statement, read the type's indexed key values and record IDs (e.g. SELECT key, rid FROM INDEX:Type[field]), read MAX/MIN values via the index shortcut, read and count TimeSeries samples, learn the type's record count, and delete index entries (DELETE FROM INDEX:Type[field]), which desynchronizes the index from the data and can defeat unique constraints. Index and type names needed for exploitation are discoverable because SELECT FROM schema:indexes is unfiltered. The issue affects both embedded and server deployments and all transports (HTTP, Bolt, Postgres, Gremlin) once a principal is bound. Fixed in 26.9.1.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-93594?


## How do I fix CVE-2026-93594?

No fix has been published for CVE-2026-93594 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-93594 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-93594 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-93594 and fix it if it is affected.

What it is: CVE-2026-93594 is a high-severity missing authorization vulnerability in ArcadeData arcadedb, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-93594 exists.

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-2026-93594/ (Markdown: https://insights.sbomify.com/CVE-2026-93594/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-93594
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-93594
- OSV: https://osv.dev/vulnerability/CVE-2026-93594

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-93594/
Summaries are generated and may contain mistakes; the official description above is the record.