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.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-93594 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-93594 exists.
Sources
Also known as GHSA-2c8m-q484-jv7m, GHSA-34w2-f24j-55hj.