CVE-2026-66803: Microsoft Azure Cosmos DB

Critical severity, CVSS 10.0. EPSS: 0.9% chance of exploitation in the next 30 days.

Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.

Affected products

• Microsoft Azure Cosmos DB: affected versions not specified

Published 2026-07-30. Last modified 2026-08-04.