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Security audit

Volc Docs

Security checks for vulnerabilities and agentic risk

Overview

This documentation skill mostly matches its stated purpose, but its fetch helper can forward arbitrary user-supplied URLs to a remote Volcengine fetch API instead of limiting requests to official documentation links.

Install only if you are comfortable with Volcengine documentation queries and fetch URLs being sent to Volcengine's remote API. Avoid using the fetch command on untrusted or non-Volcengine URLs, and prefer a version that enforces an HTTPS www.volcengine.com/docs/ allowlist before forwarding URLs.

A.I.G

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 (1)

T09 · Insecure Skill Coding Practices

Warning
Location
scripts/volcengine_docs.py:32
Finding

Unrestricted URL Forwarding to the Remote Document Fetch Service

Content
View full analysis
Remediation
View remediation

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (5)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
90% confidence
Finding

The skill describes and encourages network access to external documentation APIs but does not declare an explicit tool scope such as permissions or allowed-tools. This creates a governance gap: an agent runtime may permit broader-than-intended network use or make policy enforcement and review harder, increasing the chance of unauthorized outbound requests or misuse of the skill's network capability.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The instruction that any Volcano Engine-related consultation or documentation need should always prioritize this skill is overly broad and can bias agent routing beyond the user's actual intent or least-privilege needs. In practice, this can cause unnecessary external calls, over-collection of user queries, and suppression of safer or more appropriate tools when the task only partially relates to Volcano Engine.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
87% confidence
Finding

The natural-language description is entirely in Chinese and includes a sample fetch URL parameter '?lang=zh', but the skill does not state that language selection is optional or user-driven. This can amount to a locale policy violation because it implicitly fixes the interaction and retrieved documentation to Chinese without user opt-in.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
80% 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 · scripts/volcengine_docs.py (reported line 26)May include surrounding context.

python
"Content-Type": "application/json"
    }
    try:
        response = requests.post(url, headers=headers, json=payload, timeout=REQUEST_TIMEOUT)
        response.raise_for_status()
        return response.json()
    except Exception as e:

External Transmission

Medium
Category
Data Exfiltration
Confidence
80% 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 · scripts/volcengine_docs.py (reported line 46)May include surrounding context.

python
"Content-Type": "application/json"
    }
    try:
        response = requests.post(url, headers=headers, json=payload, timeout=REQUEST_TIMEOUT)
        response.raise_for_status()
        return response.json()
    except Exception as e:

Static analysis

No suspicious patterns detected.