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Security audit

vws-helper

Security checks for vulnerabilities and agentic risk

Overview

The skill provides purpose-aligned Git workspace management with clear controls for publishing changes and deleting workspace data.

Review and pin the upstream source before building; its executable is not bundled or verified here. Choose workspace paths carefully, preview pushes, and preserve uncommitted work before unmounting or destroying a workspace. Unmounting can permanently lose changes despite one evaluation describing it as reversible.

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 (1)

Session Persistence

Medium
Category
Rogue Agent
Confidence
60% confidence
Finding

Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Content

Scanner excerpt · SKILL.md (reported line 30)May include surrounding context.

git clone https://github.com/nano-harness/virtual-workspace.git cd virtual-workspace cargo build --release mkdir -p ~/.local/bin install -m 755 ./target/release/vwsd ~/.local/bin/vwsd

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