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Security audit

Carbone

Security checks for vulnerabilities and agentic risk

Overview

Carbone changes require approval, but the setup path can introduce broader changes to your agent environment that the skill does not explain.

Review setup before enabling this skill. Prefer a reviewed CLI release and decide whether to disable automatic skill synchronization before first use. Connecting Carbone entrusts OOMOL with its API credentials and requested operations. The skill provides clear approval rules for account changes, but its remote installers were unavailable for inspection; this review does not establish their full behavior.

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 (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied command installs tooling from an Oomol endpoint rather than performing Carbone operations. Nothing in the supplied code establishes this installation as a supporting requirement for Carbone. 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 curl-to-bash command executes the current contents of a remote installer without pinning or independently verifying them. HTTPS protects transport but not against a compromised publisher or distribution service, which could deliver code that accesses local files and credentials or modifies the system; this is the same underlying installation risk identified by SQP-2.

Content

Scanner excerpt · SKILL.md (reported line 59)May include surrounding context.

The setup workflow executes remotely downloaded installation scripts without warning about the system-integrity implications.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The setup instructions execute remotely retrieved shell or PowerShell code without integrity verification or explicit approval for local software installation. A compromised distribution endpoint could execute arbitrary code with the invoking user's permissions; limiting setup to a missing-CLI error reduces exposure but does not prevent this risk.

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 80)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