Bottom line: A vulnerability rated "high" in Microsoft Azure Cosmos DB allows remote, anonymous attackers to execute arbitrary code.
CERT-Bund is warning of a vulnerability in Microsoft Azure Cosmos DB that allows remote, unauthenticated attackers to execute arbitrary program code. The security advisory is rated with a severity of "high".
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According to security advisory WID-SEC-2026-2617 from CERT-Bund, a remote, anonymous attacker can exploit a vulnerability in Microsoft Azure Cosmos DB to execute arbitrary program code. Further technical details, such as affected versions, a CVE ID, or the specific attack vector, are not provided in the current advisory.
Azure Cosmos DB is Microsoft’s fully managed NoSQL database service and is used by many organizations as the central data store for cloud-native applications. A vulnerability enabling anonymous remote code execution therefore poses a significant risk to the confidentiality, integrity, and availability of stored data as well as connected applications. The “high” rating assigned by CERT-Bund underscores the urgency of reviewing this matter.
CISOs should identify the use of Azure Cosmos DB within their own environment and monitor official Microsoft documentation as well as forthcoming security advisories for available patches or configuration recommendations. Since this is a cloud service operated by Microsoft, remediation of the underlying vulnerability lies primarily with Microsoft; nevertheless, customers should assess whether their own network and access configurations can be adjusted as an additional protective measure until further information becomes available.
Source: wid.cert-bund.de · Published August 3, 2026
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