T09 · Insecure Skill Coding Practices
Error
- Location
scripts/render-deploy-diff.sh:4- Finding
Render API Key Exfiltration Through an Unrestricted API Base URL
- Content
View full analysis
- Remediation
View remediation
Security audit
Render Deploy Diff
Security checks for vulnerabilities and agentic risk
Overview
The skill does what it claims, but it can send a Render API key to an arbitrary API base URL if that environment variable is set.
Install only if you trust the environment where it will run. Before use, ensure RENDER_API_BASE_URL is unset or pinned to Render's real API endpoint, and avoid running it in CI or shells where untrusted code can set environment variables. Treat RENDER_API_KEY as sensitive and prefer a narrowly scoped token if Render supports it.
Vulnerability Patterns
- 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
- Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
Findings (2)
T09 · Insecure Skill Coding Practices
Warning
- Location
scripts/render-deploy-diff.sh:106- Finding
Sensitive Render API Responses Exposed Through Process Command-Line Arguments
- Content
View full analysis
- Remediation
View remediation
Vulnerability Patterns
- Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
- MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
- Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
- Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
- Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (6)
Ae1
High
- Category
- analysis-evasion
- Confidence
- 100% confidence
- Finding
Referenced artifact was not completely inspected
- Content
md bash scripts/render-deploy-diff.sh
Ae1
High
- Category
- analysis-evasion
- Confidence
- 100% confidence
- Finding
Referenced artifact was not completely inspected
- Content
md bash scripts/render-deploy-diff.sh
Ae1
High
- Category
- analysis-evasion
- Confidence
- 100% confidence
- Finding
Referenced artifact was not completely inspected
- Content
md bash scripts/render-deploy-diff.sh
Undeclared Tool Scope
Medium
- Category
- MCP Least Privilege
- Confidence
- 90% confidence
- Finding
The skill declares shell and file-reading behavior but does not define any explicit tool scope or permissions boundary. That omission can allow an agent runtime to invoke broader capabilities than intended, increasing the chance of unauthorized file access or command execution when the skill is used.
- Content
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
md #!/usr/bin/env bash set -euo pipefail API_BASE="${RENDER_API_BASE_URL:-https://api.render.com/v1}" TOKEN="${RENDER_API_KEY:-}" SERVICE_ID="${RENDER_SERVICE_ID:-}" SERVICE_NAME="${RENDER_SERVICE_NAME:-}"
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
sh #!/usr/bin/env bash set -euo pipefail API_BASE="${RENDER_API_BASE_URL:-https://api.render.com/v1}" TOKEN="${RENDER_API_KEY:-}" SERVICE_ID="${RENDER_SERVICE_ID:-}" SERVICE_NAME="${RENDER_SERVICE_NAME:-}"
Static analysis
No suspicious patterns detected.