Resend CLI

• Outcome: Pass
• Latest audit: Sep 12, 2026 · 1:00 AM UTC
• Version: 1.0.5

Overview

This is a straightforward Resend CLI reference skill whose email-sending and account-management powers are disclosed and aligned with its purpose, though users should handle sends and deletions carefully.

Install only if you want an agent to operate your Resend account. Prefer a domain-scoped sending_access key, review recipients and message content before sends or forwards, and treat any delete command using --yes as deliberate because it can disrupt email service or remove access.

A.I.G

Vulnerability Patterns

• Skill Instruction Hijacking: Alters the agent's session goals or safety constraints when the skill loads
• Agent Memory Poisoning: Writes attacker-controlled rules into memory that affect later sessions
• Remote Payload Retrieval and Execution: Fetches external code whose behavior can change after review
• Embedded Malicious Code: Ships malicious scripts inside the skill and executes them locally
• Unauthorized Access and Privilege Escalation: Obtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns

• Data Exfiltration: External Transmission, Env Variable Harvesting, File System Enumeration
• Privilege Escalation: Excessive Permissions, Sudo/Root Execution, Credential Access
• Prompt Injection: Instruction Override, Hidden Instructions, Exfiltration Commands
• Supply Chain: Unpinned Dependencies, External Script Fetching, Obfuscated Code
• Excessive Agency: Unrestricted Tool Access, Autonomous Decision Making, Scope Creep

Findings (5)

Credential Access

High

• Category: Privilege Escalation
• Confidence: 70% confidence

Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · SKILL.md (reported line 14)May include surrounding context.

md

bins: ["resend"]
    env: ["RESEND_API_KEY"]
  configPaths:
    - "~/.config/resend/credentials.json"
  install:
    - id: resend-brew
      kind: brew

Credential Access

High

• Category: Privilege Escalation
• Confidence: 70% confidence

Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · SKILL.md (reported line 32)May include surrounding context.

md

bins: ["resend"]
    env: ["RESEND_API_KEY"]
  configPaths:
    - "~/.config/resend/credentials.json"
  install:
    - id: resend-brew
      kind: brew

Credential Access

High

• Category: Privilege Escalation
• Confidence: 70% confidence

Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · SKILL.md (reported line 37)May include surrounding context.

md

bins: ["resend"]
    env: ["RESEND_API_KEY"]
  configPaths:
    - "~/.config/resend/credentials.json"
  install:
    - id: resend-brew
      kind: brew

Missing User Warnings

Medium

• Category: Not specified by scanner
• Confidence: 86% confidence

Finding

The markdown provides commands to send, batch send, and forward emails, which can transmit user or third-party data externally, but it does not warn that these actions may expose sensitive content or recipient information. For markdown skills, behaviors that affect user data or privacy should be disclosed clearly.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium

• Category: Not specified by scanner
• Confidence: 92% confidence

Finding

The markdown documents deletion commands for domains and API keys using --yes, including an explicitly irreversible API key deletion, but does not provide a clear caution section warning users about service disruption or loss of access. Under the markdown criteria, behaviors affecting system integrity or account access should be accompanied by user-facing warnings.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.