CVE-2026-75850 ArcadeDB before 26.8.1 Per-Type ACL Bypass via Batch Handlers
Attackers with limited permissions can bypass per-type ACLs to read and write unauthorized data via batch handlers in ArcadeDB.
- 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-2026-75850?
CVE-2026-75850 is a low-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 before 26.8.1 fails to bind the authenticated principal (setCurrentUser) on its batch and time-series HTTP handlers. Because no principal is bound on the worker thread, the engine's fine-grained per-type ACL layer (LocalBucket.checkPermissionsOnFile) does not execute for these handlers. In deployments that use per-type or per-group ACLs, a user with database access but only limited per-type permissions can read from and write to types they are not authorized to access by submitting requests to the batch/time-series endpoints. Deployments that rely solely on database-level access control are not affected.
Weakness: CWE-862
Which versions are affected by CVE-2026-75850?
How do I fix CVE-2026-75850?
No fix has been published for CVE-2026-75850 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-2026-75850 being exploited?
There is no known exploitation of CVE-2026-75850 in the wild and no public exploit code.
Sources
Also known as GHSA-4h2x-5rvm-qq8v, GHSA-c23x-pqcj-7hfm.