T09 · Insecure Skill Coding Practices
Warning
- Location
scripts/workflow-hardening-audit.sh:134- Finding
Valid GitHub Actions YAML Syntax Can Bypass Workflow Hardening Checks
- Content
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- Remediation
View remediation
Security audit
GitHub Actions Workflow Hardening Audit
Security checks for vulnerabilities and agentic risk
Overview
This skill is a transparent local GitHub Actions workflow audit tool, with no evidence of hidden network access, persistence, credential use, or destructive behavior.
Reasonable to install for lightweight local workflow checks, but do not treat it as a complete GitHub Actions security gate. Its parser can miss some valid YAML forms, so confirm important CI policy decisions with a proper YAML-aware workflow linter or additional review.
Vulnerability Patterns
- Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
- 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)
Vulnerability Patterns
- MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
- 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)
Undeclared Tool Scope
Medium
- Category
- MCP Least Privilege
- Confidence
- 70% confidence
- Finding
Without declared permissions the skill's intent is opaque and cannot be validated.
- Content