Description

Improper access control in Azure SQL Database allows an authorized attacker to elevate privileges over a network.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.1",
  "pubDate": "2026-08-20T22:17:55.790Z",
  "pubdate": "2026-08-20T22:17:55.790Z",
  "executiveSummary": "An improper access control vulnerability has been identified in Azure SQL Database. This security flaw allows an authenticated attacker with network access to elevate their privileges within the targeted database environment. The vulnerability impacts the access control mechanisms governing database operations and resource management within Azure SQL Database instances.\nThe primary risk implications include unauthorized privilege escalation, which could permit a malicious actor to bypass intended security boundaries and attain elevated administrative or operational roles. Consequently, this compromises the confidentiality, integrity, and availability of sensitive data managed by the database service. Exploitation of this vulnerability requires the attacker to possess prior authorized access to the network and the target system, subsequently leveraging the improper access control enforcement to execute unauthorized privilege elevation.\nOrganizations utilizing Azure SQL Database face potential security degradation if this access control flaw is left unaddressed. Mitigation relies on implementing strict role-based access control configurations and applying official security updates or patches provided by the vendor.",
  "technicalDetails": "The root cause of the vulnerability stems from improper access control enforcement within the authorization logic of Azure SQL Database. Specifically, the system fails to adequately validate or restrict user permissions during specific transactional or operational requests over the network. This allows an entity with valid baseline authorization to execute operations or assume roles that exceed their intended privilege level.\nThe affected component involves the access control and authorization subsystem of Azure SQL Database. Because the service is accessible over a network, an attacker who has authenticated to the environment can interact with vulnerable database interfaces or endpoints. The exploitation method relies on sending specially crafted requests that manipulate the flawed permission-checking routines, thereby tricking the authorization engine into granting elevated privileges.\nThe attack flow proceeds in the following structured phases. First, the attacker establishes network connectivity to the Azure SQL Database instance and authenticates using legitimate credentials corresponding to a low-privileged user role. Second, the attacker identifies and targets the specific database functions or administrative interfaces governed by the flawed access control logic. Third, the attacker transmits a payload or transactional sequence designed to exploit the authorization bypass. Fourth, the validation routine improperly evaluates the request context, resulting in the successful elevation of the attacker's privileges. Finally, the attacker achieves post-exploitation objectives, which may include unauthorized data access, modification of database configurations, or execution of administrative commands.\nAuthentication is required to initiate the attack, as the attacker must be an authorized user within the system scope. However, the privilege requirements are minimal prior to exploitation, typically starting from a standard or low-privileged context. The vulnerability is exposed over the network, allowing remote exploitation by any entity capable of reaching the Azure SQL Database service endpoints."
}