Security audit

eightctl

Security checks for vulnerabilities and agentic risk

Overview

The skill is mostly coherent for controlling an Eight Sleep device, but it installs a mutable third-party CLI that will handle account credentials and device control.

Review the upstream eightctl project before installing and prefer a pinned version if available. Only provide Eight Sleep credentials in the expected config or environment, and confirm any command that changes temperature, alarms, schedules, audio, or base angle.

A.I.G

Vulnerability Patterns

Insecure DependenciesIntroduces malicious components through unsafe dependency sources
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

Findings (1)

T08 · Insecure Dependencies

Warning

Location: SKILL.md:13
Finding: Unpinned Third-Party CLI Dependency
Content: View full analysis
Remediation: View remediation

SkillSpector

Vulnerability Patterns

MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code

Findings (1)

Description-Behavior Mismatch

Low

Category: Not specified by scanner
Confidence: 91% confidence
Finding: The manifest says the skill controls Eight Sleep pods for status, temperature, alarms, and schedules, which implies a limited set of pod-related functions. However, the documentation also advertises audio controls and adjustable base controls, which extend beyond the manifest's stated scope.
Content: No source excerpt is available for this finding.