Azure DevOps Critical Info Disclosure: CVE-2026-42826
A critical vulnerability, CVE-2026-42826, has been identified in Azure DevOps, allowing unauthorized information disclosure over a network. The National Vulnerability Database has assigned this a CVSS score of 10.0, indicating maximum severity. This exposure of sensitive information (CWE-200) could enable attackers to gain critical insights into development processes, codebases, or configuration details, significantly undermining an organization’s security posture.
The high CVSS vector (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H) highlights the ease of exploitation: no authentication is required, it can be exploited remotely over the network, and user interaction is not needed. The impact on confidentiality, integrity, and availability is rated as high. This isn’t just a data leak; it’s a direct pipeline for adversaries to map out environments, identify further weaknesses, or exfiltrate proprietary data.
Organizations leveraging Azure DevOps must treat this with extreme urgency. The lack of specifics on affected versions from the National Vulnerability Database means a broad assessment is necessary. Defenders should prioritize identifying any potential attack surface related to Azure DevOps instances and prepare for immediate patching or mitigation once Microsoft releases guidance. This level of information exposure is a red teamer’s dream and a CISO’s nightmare.
What This Means For You
- If your organization uses Azure DevOps, you need to understand the implications of CVE-2026-42826 right now. A CVSS 10.0 means unauthenticated, remote attackers can pull sensitive data. Prepare for an immediate patch cycle and audit your Azure DevOps configurations for any exposed endpoints. This is a critical intelligence leak waiting to happen.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 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.
Azure DevOps Information Disclosure Attempt - CVE-2026-42826
title: Azure DevOps Information Disclosure Attempt - CVE-2026-42826
id: scw-2026-05-07-ai-1
status: experimental
level: critical
description: |
This rule detects attempts to exploit CVE-2026-42826 by targeting the Azure DevOps build API (_apis/build/builds) with a specific query parameter (definitionId). A successful exploitation can lead to the disclosure of sensitive information. The HTTP status code 200 indicates a successful request, which is suspicious in the context of this vulnerability.
author: SCW Feed Engine (AI-generated)
date: 2026-05-07
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-42826/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/_apis/build/builds'
cs-uri-query|contains:
- 'definitionId='
sc-status:
- 200
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-42826 | Information Disclosure | Azure DevOps |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 08, 2026 at 01:16 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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