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Security audit

Snyk

Security checks for vulnerabilities and agentic risk

Overview

The Snyk reading workflow is coherent, but its fallback setup executes unchecked remote code without separate approval and under-discloses persistent agent changes.

Review and approve CLI installation separately, including its automatic agent-skill synchronization. Use a narrowly scoped Snyk credential and consider whether OOMOL should handle access to your security data. The remote installer payload remains unverified; 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
99% confidence
Finding

The supplied command performs remote code execution for an apparent Oomol CLI installation, not Snyk searching or reading. Nothing in the supplied chunk establishes this installation as a supporting dependency for Snyk functionality. The downloaded script's contents are not provided, 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

Piping a live HTTPS response directly into Bash executes remote code without first reviewing it or verifying a pinned artifact; the PowerShell alternative has the same weakness. Compromise of the distribution endpoint or installer could execute attacker-controlled code with the invoking user's privileges, exposing local files and credentials despite the skill's otherwise read-only Snyk operations.

Content

Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

Fallback setup executes remotely downloaded installation scripts without warning about local code execution or system changes.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The missing-CLI fallback directs installation through shell or PowerShell execution without requiring explicit approval or explaining that it runs code locally and may modify the system. Although limited to setup failures, this expands a read-oriented Snyk task into software installation without a clear consent boundary.

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 81)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