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Security audit

HARPA AI

Security checks for vulnerabilities and agentic risk

Overview

Review the setup first: it immediately executes downloaded software and can change skills used by other agents without explaining those changes.

Install and verify oo separately before allowing this skill to run setup. Review its cross-agent skill changes; the publisher documents OO_SKILLS_SYNC_DISABLED=1 to disable startup synchronization. Keep approval requirements for destructive commands. The only bundled artifact was fully inspected, but the remote installers and hosted connector implementation remain unverified.

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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command performs remote installer execution and contains no visible HARPA AI operations. Nothing supplied establishes the Oomol installer as a supporting dependency for HARPA AI, so its resource access and installation behavior materially differ from the declared purpose. The downloaded script's further behavior cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
85% confidence
Finding

The supplied chunk only invokes a CLI login command and contains no HARPA AI operations or explicit connection to HARPA AI. Authentication could support the declared purpose, but the supplied code does not establish that relationship or implement the described functionality.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup command streams a mutable remote script directly into Bash without verifying its integrity or reviewing it; the PowerShell alternative has the same issue. If the distribution endpoint or installer supply chain is compromised, attacker-controlled code would execute with the agent process's local permissions, potentially exposing files and credentials. The missing-CLI condition limits exposure, but the legitimate setup purpose and HTTPS do not establish the script's integrity.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 79)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources