Is GitHub MCP server safe?
What GitHub MCP server does
This is the original GitHub MCP server from the Model Context Protocol project. It calls the GitHub API to read and write repository files, push commits, create repositories, issues, pull requests and reviews, and search code. Its README carries a deprecation notice saying development moved to github/github-mcp-server, and npm marks the package as no longer supported. It authenticates with a personal access token in GITHUB_PERSONAL_ACCESS_TOKEN; the README suggests the repo scope, or public_repo for public repositories only. Before installing, consider the successor project, and if you use this one, grant the narrowest scope.
- Node.js network egress
- npm prepare hook
- MCP tool surface detected
What to do: Nothing here argues against installing it. Grant the capabilities it lists only if you expect the tool to need them.
GitHub MCP server is an MCP server analyzed by SkillTotal's deterministic static scanner. The scan found no malicious indicators. It can: install time execution, mcp tools detected and network egress — capabilities are what the code can do, not a verdict on intent. Risk score 0/100 (low).
@modelcontextprotocol/
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Automated static-analysis result. It can contain false positives and false negatives, and is not a claim about the intent of GitHub MCP server's authors. Report a false positive.
Behavioral traits
How this component maps to the CSA agentic threat model. Descriptive — it never affects the risk score.
Findings (3)
package.json has a 'prepare' script (runs on git/local installs and before publishing).
"prepare": "npm run build",
Why it matters: Usually a build step, but confirm it doesn't fetch or run remote code.
Fix: Usually a legitimate build step; confirm it only builds and does not fetch or execute remote code.
The component makes outbound network requests.
const response = await fetch(url, {Why it matters: Usually legitimate, but confirm the destinations are expected and no sensitive data leaves.
Fix: Confirm the destination hosts are expected and that no sensitive data is sent off-host.
An MCP tool surface (manifest or tool definitions) was found.
const server = new Server({server.setRequestHandler(ListToolsRequestSchema, async () => {server.setRequestHandler(CallToolRequestSchema, async (request) => {const transport = new StdioServerTransport();
Why it matters: Just context — review which tools it offers and their permissions.
Fix: Review the declared MCP tools and their permissions.
How attackers abuse these capabilities
Interactive labs on the attack class behind the rules above. They show the technique, not anything found in GitHub MCP server.
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Scan your own componentHow we determine this: deterministic static analysis (regex + AST), evidence-anchored, no code execution. Methodology →