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Security audit

ClickHouse GitHub Forensics

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed guide for querying public GitHub event data through ClickHouse and does not install code, persist anything, or request credentials.

Before installing, be aware that repository names, usernames, dates, and other query terms you ask it to investigate will be sent to ClickHouse's public playground. Avoid putting private incident details, secrets, or confidential identifiers in queries unless that sharing is acceptable.

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 (2)

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% 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 · README.md (reported line 23)May include surrounding context.

Quick Start

bash
curl -s "https://play.clickhouse.com/?user=play" \
  --data "SELECT ... FROM github_events WHERE ... FORMAT PrettyCompact"

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% 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 16)May include surrounding context.

Quick Start

bash
curl -s "https://play.clickhouse.com/?user=play" \
  --data "SELECT ... FROM github_events WHERE ... FORMAT PrettyCompact"

Static analysis

No suspicious patterns detected.