Azure DevOps MCP Server Vulnerability Enables AI Agent Hijacking

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Azure DevOps MCP Server Vulnerability Enables AI Agent Hijacking

First seen 22 Jul 2026, 10:22 UTC • •66.6

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ThreatCluster •July 23, 2026 at 09:23 UTC

•A critical vulnerability in Azure DevOps MCP allows AI agent hijacking via hidden comments.
•Attackers can exploit this flaw to access sensitive data and trigger unauthorized actions.
•No patches are currently available, heightening the urgency for organizations to secure their systems.

A critical vulnerability in Microsoft Azure DevOps Model Context Protocol (MCP) server has been identified, allowing attackers to perform indirect prompt injection attacks. By embedding invisible HTML in pull request descriptions, attackers can manipulate AI coding assistants to execute unauthorized actions. This exploitation can lead to accessing confidential wiki pages, triggering pipelines in restricted projects, and exfiltrating sensitive data. The AI agent operates with the reviewer's elevated credentials, amplifying the risk. The vulnerability affects all users of Azure DevOps MCP servers, posing a significant threat to organizations relying on this platform. As of now, no patches have been released to mitigate this vulnerability. Security professionals are advised to monitor for unusual activities related to AI agents and pull requests.

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Updated 61d ago How this analysis works

Timeline

2026-07-22

Vulnerability disclosed

A critical vulnerability in Azure DevOps MCP server was revealed, enabling indirect prompt injection attacks via hidden HTML.

2026-07-22

AI agent exploitation method detailed

The attack method allows unauthorized actions through AI agents using elevated credentials, impacting sensitive data access.

More articles in this cluster (3)

Threat Graph

8 entities, 7 inferred relationships (STIX 2.1).

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Technique (3)

Data Exfiltration
Zero-day Exploit
T1041 - Exfiltration Over C2 Channel

Organization (2)

Manifold Security
Microsoft

Weakness (1)

CWE-200 - Exposure of Sensitive Information

Affected Platform (1)

Azure DevOps

Vulnerability (1)

MCP Flaw

Relationships

MCP Flaw targets Azure DevOps
Data Exfiltration targets Azure DevOps
Zero-day Exploit targets Azure DevOps
T1041 - Exfiltration Over C2 Channel targets Azure DevOps
MCP Flaw related to Manifold Security
MCP Flaw related to Microsoft
MCP Flaw related to CWE-200 - Exposure of Sensitive Information

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