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Security audit

SpecStream: Approve Work

Security checks for vulnerabilities and agentic risk

Overview

The skill starts paid SpecStream work within an explicitly approved scope and spending limit, with safeguards against duplicate charges.

This skill can incur charges through your configured SpecStream account. Approve the exact quote, work scope, and maximum spend, and keep any standing authority narrowly bounded. The external-URL advisory reflects the disclosed integration; no unrelated transfer is instructed. The remote service's enforcement of these controls was not verified.

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 (1)

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% 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 9)May include surrounding context.

md
# Approve a price

SpecStream is the live web data engine for teams and agents. Use the configured MCP server at `https://api.specstream.ai/mcp`.

`authorize_capacity_work` starts paid work, so treat it as a write. It needs the reviewed `quote_id` and `quote_hash`, the approved maximum as an integer in `confirm_max_cents`, and a stable `idempotency_key`. A standing project or agent authority must cover this exact scope and limit. A funded account is not enough.