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Security audit

Pylon

Security checks for vulnerabilities and agentic risk

Overview

Pylon changes require confirmation, but the CLI dependency can add persistent instructions to other agents without clearly disclosing that effect in this skill.

Review the CLI's broader effects before enabling this skill. Prefer a verified CLI release and disable startup skill synchronization before first use if you only want Pylon access; upstream documents OO_SKILLS_SYNC_DISABLED=1 for this purpose. Review OOMOL's access to your Pylon data and retain the required write confirmations. The remote installer payloads remain unverified. [CLI controls](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md#environment-variables).

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
  • 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 (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied chunk installs software from a different service and shows no Pylon interaction. Nothing provided establishes that this installer is a supporting dependency for Pylon operations, so its behavior is materially inconsistent with the declared purpose. The downloaded script's contents and further effects are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup command downloads a mutable remote script and immediately executes it without a pinned version, integrity verification, or review; the PowerShell alternative has the same weakness. Compromise of the distribution endpoint or release pipeline could execute arbitrary code with the agent's local permissions, potentially exposing files and credentials. Restricting installation to a missing-command error reduces exposure but does not establish trust in the downloaded code.

Content

Scanner excerpt · SKILL.md (reported line 67)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 88)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