CVE-2026-75850: ArcadeDB before 26.8.1 Per-Type ACL Bypass via Batch Handlers

Severity: medium (CVSS 4.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-18 · updated 2026-10-22
Weakness: CWE-862

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.

Affected products

ArcadeData arcadedb: before 26.8.1 — fixed in 26.8.1

How to fix

Upgrade to a fixed version: ArcadeData arcadedb 26.8.1. Check the vendor advisory for mitigations.

References

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