Tool · curated 14 Jul 2026
Cursor Hardening Guide | How to Harden
First reported · updated · 2 reports howtoharden.com
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Why it matters
Cursor's agentic coding capabilities let AI read, modify, and execute code, so downloadable hardening scripts that enforce least-privilege, audit MCP servers, and lock down agent behavior give defenders concrete controls against prompt injection and tool abuse in developer environments.
The How to Harden Cursor guide provides a set of runnable hardening scripts (published in the grcengineering/how-to-harden GitHub repo) to secure the Cursor agentic coding IDE, covering privacy mode, .cursorignore templates, API key rotation, MCP server auditing, agent settings, rules-file auditing, workspace trust, extension auditing, telemetry, and network allowlisting. The guidance references known Cursor risks such as prompt injection, over-permissioned agent actions, and MCP-related CVEs (e.g., CVE-2025-54135/CurXecute and CVE-2025-54136/MCPoison).