Allocation of Resources Without Limits or Throttling Affecting @modelcontextprotocol/server package, versions >=2.0.0 <2.3.0
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- published23 Oct 2026
- disclosed20 Oct 2026
- creditroot-Brainoverflow, Felix Weinberger
Introduced: 20 Oct 2026
NewCVE-2026-111768 (opens in a new tab)How to fix?
Upgrade @modelcontextprotocol/server to version 2.3.0 or higher.
Overview
@modelcontextprotocol/server is a Model Context Protocol implementation for TypeScript - Server package
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the tools/call request handler in mcp.ts, where an attacker can send a tools/call request with a deeply nested or arbitrarily large arguments payload, causing unbounded recursive traversal of the input structure and exhausting server resources. The server performs no limit on the number of array elements or object members processed from tool-call arguments, allowing a remote attacker to crash the server process through resource exhaustion.