CVE-2026-69857: Azure Cosmos DB Spoofing Vulnerability

highCVSS 8.5CVE-2026-69857

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.5
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69857

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-698570.42% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-69857	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Azure Cosmos DB

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-69857: Authorization bypass through user-controlled key in Azure Cosmos DB allows an authorized attac…nvd · 2026-09-03
high[NEW] [high] Microsoft Azure Cosmos DB: Vulnerability enables code executioncert-bund · 2026-08-03
criticalCVE-2026-66803: Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code ove…nvd · 2026-07-30
criticalCVE-2026-66803: Azure Cosmos DB Remote Code Execution Vulnerabilitymsrc · 2026-07-14
criticalCVE-2026-24304: Azure Cosmos DB Remote Code Execution Vulnerabilitymsrc · 2026-07-14