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Critical vulnerability in MCP Inspector allows remote code execution on Windows

By PulseAugur Editorial · [1 sources] ·

A critical vulnerability, CVE-2026-119025, has been discovered in the MCP Inspector, a tool used to test remote Model Context Protocol servers. The vulnerability allows a malicious MCP server to execute arbitrary PowerShell code on Windows and Windows Subsystem for Linux (WSL) machines during the OAuth handshake, bypassing standard security checks. This occurs because the Inspector automatically opens a URL containing a malicious PowerShell command, which is then executed without user approval or model involvement. AI

IMPACT This vulnerability in a developer tool could impact the security of AI model testing and deployment pipelines on Windows systems.

RANK_REASON Vulnerability disclosure in a specific developer tool.

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Critical vulnerability in MCP Inspector allows remote code execution on Windows

How we ranked this

Signal score
10 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
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Tool
Vulnerability disclosure in a specific developer tool.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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product, safety
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AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — MCP tag TIER_1 English(EN) · Piekwerk ·

    MCP Inspector's OAuth flow could run PowerShell on Windows: inside CVE-2026-119025, and why npm update misses the fix

    <p>The MCP Inspector is the official debugging tool for the Model Context Protocol, and it is the tool AWS, Cloudflare and Azure docs point at when you need to test a remote MCP server before trusting it. On November 5, <a href="https://www.pillar.security/blog/inspecting-the-ins…

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