Skip to content
Threat Feed
high advisory

CVE-2026-41105 Azure Monitor Action Group Notification System Elevation of Privilege Vulnerability

A server-side request forgery vulnerability in Azure Notification Service allows an authorized attacker to elevate privileges over a network, leading to privilege escalation.

CVE-2026-41105 describes a server-side request forgery (SSRF) vulnerability residing within the Azure Monitor Action Group Notification System, a component of Microsoft Azure. An authorized attacker can exploit this vulnerability to elevate privileges within the network where the Azure Notification Service operates. The vulnerability allows an attacker to make requests on behalf of the server, potentially accessing internal resources or modifying configurations they should not have access to. Successful exploitation can lead to a significant breach of security and control within the Azure environment. This vulnerability poses a serious threat to organizations utilizing Azure Monitor, requiring immediate attention and remediation.

Attack Chain

  1. An attacker gains initial authorized access to the Azure environment with valid credentials.
  2. The attacker crafts a malicious request targeting the Azure Monitor Action Group Notification System.
  3. The crafted request leverages the SSRF vulnerability to make requests on behalf of the server.
  4. The server, due to the SSRF vulnerability, processes the malicious request without proper validation.
  5. The request is directed to internal resources or endpoints not normally accessible to the attacker.
  6. The attacker escalates privileges by accessing sensitive data or modifying system configurations via the SSRF vulnerability.
  7. The attacker leverages the elevated privileges to compromise other resources within the Azure network.

Impact

Successful exploitation of CVE-2026-41105 can lead to significant privilege escalation within the Azure environment. An attacker could potentially gain control over critical resources, modify security configurations, and access sensitive data. This could result in data breaches, service disruptions, and significant financial losses. The scope of impact depends on the extent of the attacker’s access and the criticality of the compromised resources.

Recommendation

  • Apply the security update released by Microsoft to patch CVE-2026-41105 on the Azure Monitor Action Group Notification System immediately (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41105).
  • Deploy the Sigma rule provided below to detect potential exploitation attempts targeting CVE-2026-41105, focusing on suspicious network activity originating from Azure services.
  • Monitor Azure logs for unusual requests originating from the Azure Monitor Action Group Notification System, looking for unexpected access to internal resources.

Detection coverage 2

Detects CVE-2026-41105 Exploitation Attempt — Suspicious Outbound Connection from Azure Monitor

high

Detects CVE-2026-41105 exploitation attempt — monitors for suspicious outbound network connections originating from Azure Monitor services, potentially indicating SSRF vulnerability exploitation.

sigma tactics: privilege_escalation techniques: T1190 sources: network_connection

Detects CVE-2026-41105 Exploitation Attempt — Azure Metadata Service Access

medium

Detects CVE-2026-41105 exploitation attempt — detects attempts to access the Azure Instance Metadata Service (IMDS) from unexpected sources, which could indicate SSRF exploitation.

sigma tactics: privilege_escalation techniques: T1190 sources: network_connection

Detection queries are available on the platform. Get full rules →