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Security audit

Alpaca

Security checks for vulnerabilities and agentic risk

Overview

The Alpaca data access fits the stated purpose, but automatic setup can execute unverified software and make broader changes to your agent environment.

Review the CLI installation separately and require approval before downloaded code runs or other agent skills change. Use a verified release, review its skill synchronization settings, and consider whether OOMOL should handle access to your financial account. The review concern is automatic setup and broader persistent changes; the artifact does not demonstrate malicious intent.

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
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied chunk performs no visible Alpaca search or data retrieval. Instead, it executes an external installer from an unrelated domain. This is a materially different operation from the declared read/search purpose, and the supplied code does not establish it as a supporting Alpaca implementation detail. The downloaded script's contents and further effects are unknown.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
86% confidence
Finding

The supplied chunk performs only an authentication command; it contains no Alpaca-specific operations or data retrieval. Authentication could support a data-access skill, but the supplied content does not establish that this login is for Alpaca, so its demonstrated behavior is not adequately represented by the declared purpose.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping the HTTPS response directly into bash executes mutable remote code without version pinning, integrity verification, or prior inspection. A compromised installer host or release pipeline could execute attacker-controlled commands, exposing local files and credentials; the legitimate connector dependency does not remove this supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 76)May include surrounding context.

Fallback setup executes downloaded installation scripts without warning the user about remote code execution and system changes.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

The fallback instructs the agent to execute downloaded shell or PowerShell code without first explaining the system changes or obtaining explicit installation approval. Although triggered only when the CLI is missing, this can turn a read-only data request into arbitrary code execution with the agent process's permissions.

Content

No source excerpt is available for this finding.

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 97)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