Back to skill

Security audit

Streak

Security checks for vulnerabilities and agentic risk

Overview

The Streak functions fit the stated purpose, but fallback setup can execute a remote installer without a separate approval step.

Review and approve CLI installation separately before allowing setup to run. Prefer a verified release and check whether the CLI installs or updates other agent skills. Connecting Streak gives OOMOL access to the authorized business data. The sole bundled file was fully inspected; the remaining uncertainty concerns external installer and CLI behavior. 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
96% confidence
Finding

The supplied chunk performs no Streak search or read operation. Instead, it executes an external installer, with no demonstrated connection to the declared Streak functionality. Although dependency installation can be a supporting implementation detail, the supplied content does not establish that relationship. The downloaded script's further behavior cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
97% confidence
Finding

Piping a remotely fetched, unpinned script directly into bash executes whatever the endpoint supplies with the invoking user's privileges. HTTPS protects transport but does not protect against a compromised publisher or modified installer, which could expose local credentials or files; the PowerShell setup uses the same download-and-execute pattern.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

Fallback setup executes downloaded installer scripts without warning about system changes or obtaining user approval.

Medium
Category
Output Handling
Confidence
92% confidence
Finding

The fallback instructs the agent to install software after a command-not-found error without requiring approval for executing an installer or changing the local environment. A request to read Streak data does not itself authorize arbitrary installer execution; the conditional trigger and Bash(oo *) tool restriction reduce reachability but do not make the setup instructions safe.

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 79)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