cve_lookup

Lookup CVE details

SERVERClaude Flow SOURCEclaude-flow

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-ruvnet-claude-flow/cve-lookup.md

WHAT IT DOES

What cve_lookup does on Claude Flow

AI agents call cve_lookup to retrieve information from Claude Flow without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why cve_lookup is rated Low

This tool retrieves/queries existing CVE (Common Vulnerabilities and Exposures) data with no side effects, modification, code execution, or data destruction. It is a straightforward read operation. Severity is low because the tool itself does not introduce risk; it only returns informational data about known vulnerabilities that are already public knowledge.

From the tool's definition Tool name is 'cve_lookup' with description 'Lookup CVE details'. The verb 'Lookup' and 'cve_lookup' both indicate a read-only query operation that retrieves vulnerability information from a database or external source.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs cve_lookup safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Claude Flow, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For cve_lookup, this is the rule to start with:

cve_lookup Allowed

cve_lookup is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cve_lookup": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Claude Flow, apply this rule, and every cve_lookup call is checked against it from then on.

FAQ

Questions about cve_lookup

What does the cve_lookup tool do? +

Lookup CVE details. It is categorised as a Read tool in the Claude Flow MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on cve_lookup? +

Register the Claude Flow MCP server in PolicyLayer and add a rule for cve_lookup: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Claude Flow. Nothing to install.

What risk level is cve_lookup? +

cve_lookup is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit cve_lookup? +

Yes. Add a rate_limit block to the cve_lookup rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block cve_lookup completely? +

Set action: deny in the PolicyLayer policy for cve_lookup. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides cve_lookup? +

cve_lookup is provided by the Claude Flow MCP server (claude-flow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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