Security audit

Deno

Security checks for vulnerabilities and agentic risk

Overview

This is a documentation-only Deno guidance skill that warns about permission risks rather than trying to use those permissions itself.

This skill appears safe to install as Deno reference material. Users should still review any Deno commands it helps produce and ensure permissions are scoped to specific paths, hosts, environment variables, and binaries before running them.

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

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

Findings (1)

Credential Access

High

Category: Privilege Escalation
Content: ## Permission Combinations - `--allow-read=/etc/passwd` + `--allow-net` — can exfiltrate sensitive files - `--allow-run=bash` — bash can do anything, same as allow-all - `--allow-write=.` + `--allow-run` — can write malicious script and execute - `--allow-ffi` — foreign function interface, can bypass all security
Confidence: 60% confidence
Finding: Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Static analysis

No suspicious patterns detected.