CVE-2026-75843: Arcadedata Arcadedb

Critical severity, CVSS 9.9. EPSS: 0.4% chance of exploitation in the next 30 days.

ArcadeDB before 26.8.1 fails to bind the authenticated principal on the gRPC transaction executor thread in beginTransaction, allowing authenticated readers to execute JavaScript commands without scripting authorization checks. Attackers can execute executeCommand with a transaction ID to run unrestricted JavaScript that creates server-wide administrator accounts.

Affected products

• Arcadedata Arcadedb: before 26.8.1 (fixed in 26.8.1)

Published 2026-08-18. Last modified 2026-08-31.