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WARDEN firewall bypassed in 14 of 17 attacks, reduced to 2 after improvements

By PulseAugur Editorial · [1 sources] ·

A security researcher detailed an attack on their own WARDEN firewall, designed to protect coding agents. Using the firewall's open-source code, they crafted 17 distinct attacks, with 14 successfully bypassing the security measures. Following a day of focused effort and two passes of improvements, they reduced the number of successful attacks to two. Key enhancements included more robust fingerprinting of sensitive data and improved tracking of data flow through tool arguments. AI

IMPACT Highlights potential security gaps in agent firewalls, prompting developers to enhance data protection measures.

RANK_REASON Security research on a specific tool's vulnerabilities.

Read on dev.to — MCP tag →

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

WARDEN firewall bypassed in 14 of 17 attacks, reduced to 2 after improvements

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7 / 100
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Tool
Security research on a specific tool's vulnerabilities.
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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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safety, product
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High
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Same-day
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COVERAGE [1]

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

    We attacked our own MCP firewall with its source code open. 14 of 17 attacks got through; now 2 of 23 do

    <p>Someone building a guard for coding agents wrote to us with one question: what does WARDEN still not catch?</p> <p>We had an answer ready. The flow guard's documentation ends with a section called "What it does not do": leaks in pieces smaller than its fingerprints, tools nobo…

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