CVE-2026-75853 ArcadeDB Gremlin Wire Protocol Authorization Bypass Cross-Database
Attackers with any valid credential can read, write, or drop data in any database on the server by bypassing authorization checks in the Gremlin wire protocol.
- 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-2026-75853?
CVE-2026-75853 is a high-severity missing authorization vulnerability in ArcadeData arcadedb, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
ArcadeDB's Gremlin wire-protocol plugin (com.arcadedb:arcadedb-gremlin) in versions <= 26.7.3 enforces authentication (SASL PLAIN) but performs no authorization: it never checks database access permissions (canAccessToDatabase) and never binds the authenticated principal into the engine. As a result, any valid server credential — even one provisioned for zero or one unrelated database — can read, write, and drop data in any database on the server by selecting a target database via a traversal-source alias, completely bypassing the engine's per-type/read-only/UPDATE_SCHEMA ACLs. The issue is fixed in version 26.8.1.
Weakness: CWE-862
Which versions are affected by CVE-2026-75853?
How do I fix CVE-2026-75853?
No fix has been published for CVE-2026-75853 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-2026-75853 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-75853 exists.
Sources
Also known as GHSA-c287-v325-j5jx, GHSA-jfxf-4v73-8xw7.