CVE-2026-66803CWE-284broken-access-control

CVE-2026-66803

Critical · published July 31, 2026

CVSS v3.1
10.0
EPSS
1%
Percentile
59.3
In the wild
Unconfirmed
What it is

Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00901 · 59.3th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-07-31T01:18Z
Affected products (1)
ProductVersionsFixed in
microsoft/azure_cosmos_dball versions—
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66803 · [email protected]
EPSS history
Timeline
  • 30 JUL 20:28Z
    Azure Cosmos DB Remote Code Execution Vulnerability
    cvelistv5