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Apify MCP Server Vulnerability Leaks API Tokens Via URL Concatenation

By PulseAugur Editorial · [1 sources] ·

A critical vulnerability in Apify's MCP server allowed API tokens to be leaked through URL concatenation, as detailed in GitHub advisory GHSA-6gr2-qh89-hxwm. The flaw, fixed in version 0.10.11, occurred when a malicious Actor definition manipulated the URL to point to an attacker-controlled domain, inadvertently sending the user's API token with the connection. This vulnerability highlights a broader class of bugs related to unbound construction before credential attachment, where a lack of independent verification of the admitted URL can lead to token exfiltration. AI

IMPACT This vulnerability highlights potential security risks in how AI platforms handle API tokens and user data, emphasizing the need for robust security practices in interconnected systems.

RANK_REASON The item details a specific software vulnerability and its fix, which is a product-level security issue.

Read on dev.to — MCP tag →

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

Apify MCP Server Vulnerability Leaks API Tokens Via URL Concatenation

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The item details a specific software vulnerability and its fix, which is a product-level security issue.
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product, safety
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45 days old
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COVERAGE [1]

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

    An MCP server leaked API tokens through URL concatenation — here's the class of bug behind it

    <h1> An MCP server leaked API tokens through URL concatenation — here's the class of bug behind it </h1> <p><strong>Published: August 24, 2026</strong></p> <p>On August 18, GitHub published <a href="https://github.com/apify/apify-mcp-server/security/advisories/GHSA-6gr2-qh89-hxwm…

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