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Security audit

Griptape

Security checks for vulnerabilities and agentic risk

Overview

Review is needed because the skill directs the agent to run a remote installer without verifying it or obtaining separate installation approval.

Review and approve the CLI installation separately, using a verified release, and check or disable automatic bundled-skill synchronization. Connect only the Griptape permissions needed and retain the required confirmations for changes and deletions. All bundled artifact content was inspected, but the remote installers and hosted connector implementation were not verified. No malicious behavior was established.

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 code executes an Oomol installer and contains no Griptape operations or evidence that this installation supports Griptape functionality. Its resource access and apparent primary purpose therefore differ materially from the description. The downloaded script is 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 command pipes a mutable remote script directly into Bash without a pinned version, independent integrity verification, or review; the PowerShell alternative has the same underlying issue. If the distribution endpoint or release pipeline is compromised, attacker-controlled code executes with the agent's local privileges, potentially accessing files and credentials. HTTPS and the legitimate dependency context reduce some risks but do not establish the integrity of the delivered script.

Content

Scanner excerpt · SKILL.md (reported line 66)May include surrounding context.

The fallback setup executes downloaded installation scripts without warning about running remote code or modifying the local system.

Medium
Category
Output Handling
Confidence
93% confidence
Finding

The fallback directs the agent to install software after a missing-command error without requiring approval for executing remote code or modifying the local environment. Although conditional and relevant to the task, this expands a Griptape data request into local software installation; the confirmation rules for Griptape writes do not cover this action.

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 87)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