Security audit

Goldrush X402

Security checks for vulnerabilities and agentic risk

Overview

The skill is coherent documentation for wallet-paid blockchain API access, but it should be reviewed because its examples give an agent a wallet private key and allow automatic payments without clear local spending controls.

Review this skill before use. Use only a dedicated low-balance wallet, preferably testnet-only, never reuse a wallet that holds valuable assets, store the private key in a secrets manager, pin and audit the x402 dependencies, and add local payment controls for chain, token, recipient, per-request amount, retries, and total spend before allowing an agent to run autonomously.

A.I.G

Vulnerability Patterns

Insecure DependenciesIntroduces malicious components through unsafe dependency sources
Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
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

Findings (2)

T08 · Insecure Dependencies

Warning

Location: SKILL.md:30
Finding: Unpinned Third-Party Wallet Dependencies
Content: View full analysis
Remediation: View remediation

T09 · Insecure Skill Coding Practices

Warning

Location: SKILL.md:14
Finding: Automatic Wallet Payments Lack Documented Local Spending Controls
Content: View full analysis
Remediation: View remediation

SkillSpector

Vulnerability Patterns

Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code

Findings (5)

Vague Triggers

Medium

Category: Not specified by scanner
Confidence: 92% confidence
Finding: The description says to use this skill whenever the user is 'building an AI agent that needs blockchain data', 'wants wallet-based micropayments', or 'wants no-signup/no-onboarding blockchain data access'. These triggers are expansive and lack clear boundaries or exclusion examples, which could cause the skill to be invoked for many ordinary blockchain data requests where another skill may be more appropriate.
Content: No source excerpt is available for this finding.

Missing User Warnings

Medium

Category: Not specified by scanner
Confidence: 95% confidence
Finding: The example instructs users to supply a wallet private key and enables automatic payment handling, but it omits warnings about secret handling, hot-wallet risk, and the fact that requests can spend funds. In an agent context, this can lead to unsafe key exposure or unattended micropayment spending if developers copy the example directly into production workflows.
Content: No source excerpt is available for this finding.

Missing User Warnings

Medium

Category: Not specified by scanner
Confidence: 91% confidence
Finding: This markdown file includes a TypeScript example that reads process.env.WALLET_PRIVATE_KEY, which is a sensitive credential. The surrounding text explains how to use the key but does not warn users about securely storing the private key or the risks of exposing it.
Content: No source excerpt is available for this finding.

External Transmission

Medium

Category: Data Exfiltration
Confidence: 50% confidence
Finding: Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
Content: Scanner excerpt · SKILL.md (reported line 52)May include surrounding context.
md
All 60+ Foundational API endpoints are available through the x402 proxy. Endpoint paths mirror the Foundational API. **Base URL:** `https://x402.goldrush.dev/v1` (replaces `https://api.covalenthq.com/v1`) ### Key Data Endpoints

External Transmission

Medium

Category: Data Exfiltration
Confidence: 50% confidence
Finding: Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
Content: Scanner excerpt · references/endpoints.md (reported line 40)May include surrounding context.
md
All 60+ Foundational API endpoints are available through the x402 proxy. Endpoint paths mirror the Foundational API. **Base URL:** `https://x402.goldrush.dev/v1` (replaces `https://api.covalenthq.com/v1`) ### Key Data Endpoints

Static analysis

No suspicious patterns detected.