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Security audit

Caranguejo

Security checks for vulnerabilities and agentic risk

Overview

This is a simple Pernambuco culture and football response-style skill with no executable code or privileged behavior.

Installers should expect this skill to influence response topic, tone, and default language for Pernambuco-related prompts. The main caveat is a minor language metadata mismatch: the manifest says English, while the instructions default to Brazilian Portuguese and allow English on request.

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
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • 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 (2)

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
89% confidence
Finding

The manifest sets "language": "en", which is a natural-language policy concern because it hard-codes a locale/language choice without indicating user choice or a justified region-specific requirement. Given the subject matter is localized Brazilian culture, this may conflict with expectations unless the language restriction is explicitly documented as intentional and optional.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
90% confidence
Finding

The language behavior section states the skill should normally respond in Brazilian Portuguese and sets the default language to pt-BR. While it allows English if the user asks in English, it still establishes a specific locale by default rather than explicitly offering the user a language choice.

Content

No source excerpt is available for this finding.