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Security audit

Gumloop

Security checks for vulnerabilities and agentic risk

Overview

The Gumloop actions have sensible safeguards, but setup can execute unverified code and introduce broader changes to your agent’s skills without clear approval.

Review and approve the CLI installation separately, preferably using a pinned, verified release. Trusting this integration also means trusting OOMOL with your connected Gumloop account and task data. Before using the CLI, review its automatic skill installation; current documentation provides OO_SKILLS_SYNC_DISABLED=1 to disable startup synchronization. Keep the skill’s confirmation requirements for starting or stopping flows. Remote installers and hosted behavior were not verified; no malicious behavior was established in the supplied artifact.

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
99% confidence
Finding

The supplied command installs software from an unrelated service and shows no Gumloop functionality or established supporting role for Gumloop operations. The remote script's contents are not supplied, so its further effects 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 streams a mutable remote installer directly into Bash without pinning or verifying its contents. HTTPS protects transport but does not prevent a compromised distribution endpoint from supplying code that steals accessible credentials or modifies local files; the documented OOMOL dependency explains the destination but does not eliminate this supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 61)May include surrounding context.

The setup workflow instructs the agent to execute remote installation scripts without warning the user about the system-integrity implications.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

When the CLI is missing, the skill instructs installation through remotely fetched shell or PowerShell code without explicit approval or integrity verification. Although this is conditional setup rather than hidden execution, it expands a Gumloop task into host-system modification and could execute malicious code with the invoking user's privileges if the installation source is compromised.

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 82)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