CVE-2026-66803
Azure Cosmos DB Remote Code Execution Vulnerability
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Azure Cosmos DB Remote Code Execution Vulnerability
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-66803- CVSS 3.1
- 10.0 Critical
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 - Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2026-51302
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
- Record
EUVD-2026-51302- CVSS 3.1
- 10.0 Critical
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-ww36-75qc-rhmx
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a...
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
- Record
GHSA-ww36-75qc-rhmx- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-284
- Updated
- 2026-11-02
NVD
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-66803- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-284
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-66803 is a critical vulnerability (CVSS 10.0) in Microsoft Azure Cosmos Db, published July 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.90%, the 59th percentile. No source names a fixed version.