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Security audit

keephaven

Security checks for vulnerabilities and agentic risk

Overview

The local-memory features fit the purpose, but the skill directs external diagnostic sharing without clear user control and runs unpinned downloaded code.

Keep diagnostics local unless you approve the exact report and recipient; social replies may be public. Review and pin the MCP package before giving it a memory token, and inspect the VM scripts before running them. The Review verdict reflects these concrete control gaps, not evidence of intentional malicious behavior.

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (5)

Skill declares no tool scope ('permissions' or 'allowed-tools') but code capabilities were detected: network.

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 16)May include surrounding context.

md
Only for a Keephaven Agent Memory box (released 2026-10-25, for a Pi 5 or a USB SSD on a Windows PC: https://keephaven.co/agent-memory). Home and Photos boxes don't have it. Check first:

    curl -s http://<box>:8790/v1/health

`{"ok": true, ...}` means it's there. No answer means this box doesn't have it.

MCP server referenced without pinned version: 'npx -y github'.

Medium
Category
MCP Rug Pull
Confidence
98% confidence
Finding

The npx command retrieves and executes code from a mutable GitHub reference, with automatic confirmation and no immutable version pin. A compromised repository or malicious update could execute with the user's privileges and access the MCP server's environment, including its memory-access token.

Content

No source excerpt is available for this finding.

The skill instructs the agent to send diagnostic results to an external recipient, beyond its stated local-storage and VM-checking purpose.

Medium
Category
Excessive Agency
Confidence
96% confidence
Finding

The skill directs the agent to send a report and unspecified failure details to a third-party recipient without obtaining separate user approval. This crosses the local-data trust boundary emphasized by the skill, and failure details could reveal local paths, network information, or other sensitive diagnostic context.

Content

No source excerpt is available for this finding.

The workflow instructs the agent to send test results and failure details to an external recipient without a privacy warning.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The reporting instruction provides no privacy guidance or limits on what 'anything that broke' includes, creating a risk of disclosing sensitive diagnostics, especially through public replies. This is the same underlying disclosure issue as SDI-1, not an independent transmission mechanism.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.