fast-agent: `fast-agent serve` binds HTTP to 0.0.0.0 with no authentication by default; with --shell this is unauthenticated remote command execution
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| evalstate | fast-agent | affected |
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| Evalstate | Fast-agent |
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Github GHSA |
GHSA-9vhv-g5hf-m7m7 | fast-agent: `fast-agent serve` binds HTTP to 0.0.0.0 with no authentication by default; with --shell this is unauthenticated remote command execution |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.291% probability within 30 days)
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ssvc
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| First Time appeared |
Evalstate
Evalstate fast-agent |
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| Vendors & Products |
Evalstate
Evalstate fast-agent |
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| Description | fast-agent is a framework for building, running, and evaluating AI agents with Model Context Protocol support. Prior to 0.7.21, fast-agent serve uses HTTP transport bound to 0.0.0.0 on port 8000 without authentication, allowing any network client that can reach the /mcp endpoint to invoke the exposed agent tool. When the server is started with --shell, the agent can call the local execute tool implemented by tools/local_shell_executor.py, so an unauthenticated remote client can cause operating-system commands to run as the server user; without --shell, the client can still consume the operator's model and configured MCP tools. The defaults are defined in cli/commands/serve.py and mcp/server/agent_server.py, and the non-interactive server permission prompt does not prevent the described access. This issue is fixed in version 0.7.21. | |
| Title | fast-agent: `fast-agent serve` binds HTTP to 0.0.0.0 with no authentication by default; with --shell this is unauthenticated remote command execution | |
| Weaknesses | CWE-306 CWE-78 |
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| Metrics |
cvssV3_1
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