Harvest

• Outcome: Review
• Latest audit: Nov 3, 2026 · 12:08 PM UTC
• Version: 1.0.7

Overview

Harvest changes require approval, but automatic setup executes unverified downloaded code without a separate approval step.

Review the setup before installing. Independently obtain and verify the CLI, check its automatic changes to installed agent skills, and limit the connected Harvest account's permissions. OOMOL mediates Harvest access and credentials. The downloaded installers and hosted implementation remain unverified; no malicious behavior was established in the bundled artifact.

A.I.G

Vulnerability Patterns

• Skill Instruction Hijacking: Alters the agent's session goals or safety constraints when the skill loads
• Agent Memory Poisoning: Writes attacker-controlled rules into memory that affect later sessions
• Remote Payload Retrieval and Execution: Fetches external code whose behavior can change after review
• Embedded Malicious Code: Ships malicious scripts inside the skill and executes them locally
• Unauthorized Access and Privilege Escalation: Obtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns

• Supply Chain: Unpinned Dependencies, External Script Fetching, Obfuscated Code
• Excessive Agency: Unrestricted Tool Access, Autonomous Decision Making, Scope Creep
• MCP Tool Poisoning: Hidden Instructions, Unicode Deception, Parameter Description Injection
• Prompt Injection: Instruction Override, Hidden Instructions, Exfiltration Commands
• Data Exfiltration: External Transmission, Env Variable Harvesting, File System Enumeration

Findings (3)

Description-Behavior Mismatch

High

• Category: MCP Tool Poisoning
• Confidence: 97% confidence

Finding

The supplied command executes an Oomol installer rather than interacting with Harvest. Dependency installation can be a supporting implementation detail, but the provided content does not establish that this installer supports Harvest functionality. The remote script's contents are not supplied, so its additional behavior cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High

• Category: Supply Chain
• Confidence: 98% confidence

Finding

The setup instructions pipe a remotely retrieved, unpinned script directly into Bash, with an equivalent download-and-execute pattern for PowerShell. Compromise of the distribution endpoint or installer could execute arbitrary code with the invoking user's privileges, exposing local files and credentials. The missing-CLI prerequisite limits when this occurs, and the declared tool allowlist may block installation if enforced, but neither makes the installation instructions themselves safe.

Content

Scanner excerpt · SKILL.md (reported line 69)May include surrounding context.

• oo: command not found — install the oo CLI (other platforms: https://cli.oomol.com/install-guide.md):

  bash

  curl -fsSL https://cli.oomol.com/install.sh | bash    # macOS / Linux
  

  powershell

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 90)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