CVE-2026-42823: Critical Privilege Escalation in Azure Logic Apps
The National Vulnerability Database has disclosed CVE-2026-42823, a critical improper access control vulnerability in Azure Logic Apps. This flaw, rated 9.9 CVSS, allows an authenticated attacker to elevate privileges over the network. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H indicates a low attack complexity with no user interaction required, leading to complete compromise of confidentiality, integrity, and availability.
This isn’t a theoretical issue; it’s a direct path to higher-level access for an attacker already inside your perimeter. Logic Apps are often the glue for critical business processes, integrating various services and handling sensitive data. A privilege escalation here means an attacker could gain control over these workflows, manipulate data, or pivot to other connected systems within your Azure environment.
Defenders need to treat this with extreme urgency. Given the critical score and the nature of Logic Apps, a successful exploit could lead to significant operational disruption and data exfiltration. The attacker’s calculus is simple: find an authenticated user, exploit this flaw, and gain control of high-value automation.
What This Means For You
- If your organization uses Azure Logic Apps, you must monitor for patches and immediately apply them once available. Audit your Logic Apps configurations for excessive permissions and review logs for any anomalous access patterns or modifications to workflows, even from authenticated users.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-42823: Azure Logic Apps Unauthorized Privilege Escalation Attempt
title: CVE-2026-42823: Azure Logic Apps Unauthorized Privilege Escalation Attempt
id: scw-2026-05-12-ai-1
status: experimental
level: critical
description: |
Detects attempts to exploit CVE-2026-42823 by targeting the Azure Logic Apps API endpoint with a specific POST request and 'action=execute' query parameter, indicating a potential privilege escalation attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-05-12
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-42823/
tags:
- attack.privilege_escalation
- attack.t1068
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/api/logicapp/run'
cs-method:
- 'POST'
sc-status:
- '200'
cs-uri-query|contains:
- 'action=execute'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-42823 | Privilege Escalation | Improper access control in Azure Logic Apps |
| CVE-2026-42823 | Auth Bypass | Azure Logic Apps |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 12, 2026 at 21:17 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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