Critical

Privilege Escalation in Azure Logic Apps

IdentifiersCVE-2026-42823CWE-284· Improper Access Control

CVE-2026-42823 is an improper access control vulnerability in Azure Logic Apps. According to Microsoft, the flaw allows an authorized attacker to elevate privileges over a network. The available information indicates the issue stems from insufficient enforcement of access restrictions within the Azure Logic Apps service, enabling a low-privileged authenticated actor to gain permissions beyond those intended. Microsoft classifies the issue as an elevation-of-privilege vulnerability and assigns CVSS v3.1 vector AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H, indicating network reachability, low attack complexity, no user interaction, and high impact across confidentiality, integrity, and availability with changed scope.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an authenticated attacker with low privileges to elevate privileges within or through Azure Logic Apps and affect resources beyond the original security boundary. Based on the published CVSS vector and Microsoft advisory language, exploitation can result in high-impact compromise of confidentiality, integrity, and availability, potentially enabling unauthorized access to data, unauthorized modification of workflows or connected resources, and disruption of service operations.

Mitigation

If you can’t patch tonight, do this now.

Monitor Azure Service Health notifications for notices related to CVE-2026-42823 and review the associated guidance in the Azure portal. Microsoft states that affected customers will receive specific mitigation instructions and required actions, and can reference Tracking ID 1P8-C0G for applicable guidance and remediation steps. Until remediation is confirmed, restrict unnecessary privileges and review access controls for Logic Apps-associated identities and connected resources where feasible.

Remediation

Patch, then assume compromise.

Apply the Microsoft-provided fix for CVE-2026-42823. For affected Azure Logic Apps resources, follow the vendor guidance delivered through Azure Service Health notifications. Microsoft states that impacted organizations will receive service-specific instructions and that the Security Updates table for this CVE may be updated with additional information as it becomes available.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Microsoft CorporationAzure Logic Appsapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

9 SOURCESView more in app

microsoft generalNews

May 18, 2026

2026 年 5 月のセキュリティ更新プログラム (月例)

Azure Logic Apps の特権昇格脆弱性。CVSS 基本値が 9.8 以上で、認証やユーザー操作なしで悪用可能とされる。公開前の悪用や一般公開はなかったが、早急なリスク評価と更新適用が推奨されている。

the hacker newsNews

May 13, 2026

Microsoft Patches 138 Vulnerabilities, Including DNS and Netlogon RCE Flaws

An improper access control vulnerability in Azure Logic Apps that allows authorized privilege escalation over a network.

cyberscoopNews

May 12, 2026

Microsoft addresses 137 vulnerabilities in May’s Patch Tuesday, including 13 rated critical | CyberScoop

A critical vulnerability affecting Azure, disclosed by Microsoft as part of Patch Tuesday.

cvefeed high severityNews

May 12, 2026

CVE-2026-42823 - Azure Logic Apps Elevation of Privilege Vulnerability

An improper access control vulnerability in Azure Logic Apps that allows an authorized attacker to elevate privileges over a network.

+1 more in the timeline

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity4