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Security audit

Tremendous

Security checks for vulnerabilities and agentic risk

Overview

The Tremendous workflow requires approval for account changes, but its setup instructions can execute downloaded software without asking first.

Review before installing because the missing-CLI fallback executes an unverified remote installer automatically. Install a reviewed CLI release yourself and prevent automatic setup. Connecting Tremendous gives OOMOL access to the account; retain the required confirmation for reward orders and other writes. Installer contents and server-side implementation were unavailable for verification. No artifact-backed malicious behavior was found.

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
97% confidence
Finding

The supplied command performs remote script execution rather than any visible Tremendous operation. Although installing a dependency can be a supporting implementation detail, this chunk provides no evidence that the Oomol installer supports the declared Tremendous functionality. The downloaded script's contents and further effects cannot be determined from the supplied code.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a mutable remote script directly into bash executes whatever the installation endpoint returns without integrity verification or a review opportunity. The domain is relevant to the connector and HTTPS protects transport, but neither prevents malicious code execution if the distribution endpoint or its publishing pipeline is compromised; the PowerShell alternative has the same weakness.

Content

Scanner excerpt · SKILL.md (reported line 67)May include surrounding context.

Fallback setup executes downloaded installation scripts without warning about local system changes.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The fallback directs the agent to execute downloaded installation code without first explaining local changes or obtaining explicit installation approval. Although limited to a missing-CLI error, this expands an ordinary Tremendous request into local code execution, and a compromised installer could access files and credentials available to the executing user.

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 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