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Security audit

EigenSkill Builder

Security checks for vulnerabilities and agentic risk

Overview

This is a Markdown-only guide for creating and publishing skills, and its commands are disclosed examples aligned with that purpose.

Before installing, treat this as a guide that may lead an agent to suggest ClawHub publish, install, or update commands. Run broad update or publish commands only when you intend to change installed skills or publish content, and review generated skills for secrets before publishing.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • Rogue AgentSelf-Modification, Session Persistence
  • 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 (3)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 35)May include surrounding context.

md
Every skill is a directory containing at minimum a `SKILL.md` file. The directory name should be kebab-case and match the skill name.

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 530)May include surrounding context.

md
Every skill is a directory containing at minimum a `SKILL.md` file. The directory name should be kebab-case and match the skill name.

Self-Modification

High
Category
Rogue Agent
Confidence
85% confidence
Finding

Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.

Content

Scanner excerpt · SKILL.md (reported line 360)May include surrounding context.

md
clawhub publish ./skills/my-skill/
clawhub publish ./skills/my-skill/ --dry-run  # Validate without publishing

# Update skills
clawhub update                          # Update all installed skills
clawhub update financial-analysis-agent  # Update specific skill
clawhub outdated                         # List skills with available updates