MSRC-CVE-2026-69857 — Azure Cosmos DB Spoofing Vulnerability

Summary

Impact: Spoofing. Microsoft rating: Critical. Not known to be exploited — Exploitation More Likely. Customer action: Not required.

Details

Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?
This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency.
Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.

Vulnerabilities 1

High 8.5

CVE-2026-69857

Azure Cosmos DB Spoofing Vulnerability

Authorization bypass through user-controlled key in Azure Cosmos DB allows an authorized attacker to perform spoofing over a network.

Microsoft Azure Cosmos DB

Sep 3, 2026

Revision history

2026-09-08 #1
Information published.

References

CVE-2026-69857 Azure Cosmos DB Spoofing Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69857
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss