Executive Summary

This vulnerability affects the Fill Text Template block in AutoGPT versions prior to 0.6.52. Although the backend uses a SandboxedEnvironment to block unauthorized attribute access, it does not limit the computational complexity or execution time of expressions. An attacker can exploit this by submitting computationally expensive Python or Jinja2 expressions that consume excessive CPU and memory resources.

As a result, the server can hang or crash, causing a Denial of Service (DoS) condition.

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Impact Analysis

The vulnerability can lead to a complete system hang or crash due to resource exhaustion caused by expensive computations.

In multi-tenant or self-hosted environments, this can cause a full service outage and "noisy neighbor" effects, where one tenant's actions degrade the service for others.

Recovery requires manual administrative intervention, which can lead to downtime and operational disruption.

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Mitigation Strategies

To mitigate this vulnerability, you should upgrade AutoGPT to version 0.6.52 or later, where the issue has been fixed.

This update addresses the problem by limiting the computational complexity and execution time of expressions in the Fill Text Template block, preventing Denial of Service attacks caused by expensive Python/Jinja2 expressions.

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