Vulnerability · Published Jul 30, 2026 · Assigned by microsoft
CVE-2026-66803Azure Cosmos DB Remote Code Execution Vulnerability
Critical 10.0
In plain English
A critical-severity improper access control in Azure Cosmos DB from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).
Severity (CVSS 3.1)10.0Critical
Exploit odds (30 days)0.9%top 40.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Azure Cosmos DB | - |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Azure Cosmos DB Remote Code Execution Vulnerability vendor-advisory, patch