ClawHub
Back to skill

Security audit

nevermined-router

Security checks for vulnerabilities and agentic risk

Overview

This skill is a clearly documented payment-router guide that uses a Nevermined API key to buy capped external service calls, with strong warnings around budget limits and credential handling.

Install only if you intend the agent to spend from a Nevermined-funded wallet. Use sandbox keys for testing, set small Delegation caps and expiries, consider recipient scoping when practical, and keep NVM_API_KEY separate from merchant credentials.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (5)

External Transmission

Medium
Category
Data Exfiltration
Content
A **Delegation** is the budget: a hard cap in cents plus an expiry, enforced server-side on every single payment. Create it once, reuse the id.

```bash
curl -sX POST "$NVM_API_URL/api/v1/delegation/create" \
  -H "Authorization: Bearer $NVM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"provider":"erc4337","currency":"usdc","spendingLimitCents":500,"durationSecs":604800}'
Confidence
60% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
Your budget. A hard cap in cents plus an expiry, enforced server-side on **every** payment.

```bash
curl -sX POST "$NVM_API_URL/api/v1/delegation/create" \
  -H "Authorization: Bearer $NVM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"provider":"erc4337","currency":"usdc","spendingLimitCents":500,"durationSecs":604800}'
Confidence
60% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
## Closing a mode-A record

```bash
curl -sX POST "$NVM_API_URL/api/v1/router/payments/$PAYMENT_ID/settled" \
  -H "Authorization: Bearer $NVM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"txHash":"0xfc8af37b…"}'
Confidence
60% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
## Closing a mode-A record

```bash
curl -sX POST "$NVM_API_URL/api/v1/router/payments/$PAYMENT_ID/settled" \
  -H "Authorization: Bearer $NVM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"txHash":"0xfc8af37b…"}'
Confidence
60% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
| `X-Router-Forward-<name>` | no | Send `<name>: <value>` upstream (see below) |

```bash
curl -sN -X POST "$NVM_API_URL/api/v1/router/proxy" \
  -H "Authorization: Bearer $NVM_API_KEY" \
  -H "X-Router-Target-Url: https://service.example/stream" \
  -H "X-Router-Delegation-Id: $NVM_DELEGATION_ID" \
Confidence
60% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Static analysis

No suspicious patterns detected.