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Security audit

linear-native-node

Security checks for vulnerabilities and agentic risk

Overview

This is a disclosed Linear helper that reads a Linear API key from the environment and uses it only to query or explicitly update Linear.

Install only if you are comfortable giving the skill a Linear API key whose permissions match your account. Prefer the least-privileged Linear key available, avoid sharing raw command output externally because it may include issue details or emails, and only approve --execute commands when the exact Linear mutation is intended.

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
  • Rogue AgentSelf-Modification, Session Persistence
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (12)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 13)May include surrounding context.

md
Use `scripts/linear.mjs` to talk directly to Linear's GraphQL API at `https://api.linear.app/graphql`.

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 194)May include surrounding context.

md
Use `scripts/linear.mjs` to talk directly to Linear's GraphQL API at `https://api.linear.app/graphql`.

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 197)May include surrounding context.

md
Use `scripts/linear.mjs` to talk directly to Linear's GraphQL API at `https://api.linear.app/graphql`.

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 205)May include surrounding context.

md
Use `scripts/linear.mjs` to talk directly to Linear's GraphQL API at `https://api.linear.app/graphql`.

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 208)May include surrounding context.

md
Use `scripts/linear.mjs` to talk directly to Linear's GraphQL API at `https://api.linear.app/graphql`.

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 237)May include surrounding context.

md
Use `scripts/linear.mjs` to talk directly to Linear's GraphQL API at `https://api.linear.app/graphql`.

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 237)May include surrounding context.

md
`1.0.6`: Package-only cleanup: publish runtime files plus packaging metadata (`SKILL.md`, `.clawhubignore`, and `scripts/linear.mjs`) and keep the local test h

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
93% confidence
Finding

The skill explicitly uses environment variables and outbound network access, but the frontmatter does not declare a corresponding tool/permission scope. That mismatch weakens policy enforcement and review because an operator may not realize the skill can access secrets and transmit workspace data to an external API. In context, this is less dangerous than an arbitrary exfiltration pattern because the destination is fixed to Linear and the behavior is documented, but it is still a real security metadata gap.

Content

No source excerpt is available for this finding.

Session Persistence

Medium
Category
Rogue Agent
Confidence
60% confidence
Finding

Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Content

Scanner excerpt · SKILL.md (reported line 3)May include surrounding context.

md
---
name: linear-native-node
description: Linear workspace helper using Linear's GraphQL API from native Node.js. Use when creating, listing, updating, commenting on, summarizing, or looking up Linear issues, projects, teams, workflow states, priorities, standup notes, or branch names. Write actions are explicit and approval-gated via create/comment/status/priority/project-create commands. Reads LINEAR_API_KEY from the process environment only; no OAuth gateway, bash, Python, npm dependencies, or third-party intermediary/proxy service.
version: 1.0.22
risk_class: external-api-read-write-gated
---

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 13)May include surrounding context.

md
// Linear GraphQL helper - native Node.js, zero dependencies.
// Requires Node 18+ for global fetch. Reads LINEAR_API_KEY from the process environment only.

const ENDPOINT = "https://api.linear.app/graphql";
const PRIORITIES = new Map([
  ["none", 0],
  ["urgent", 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 21)May include surrounding context.

md
// Linear GraphQL helper - native Node.js, zero dependencies.
// Requires Node 18+ for global fetch. Reads LINEAR_API_KEY from the process environment only.

const ENDPOINT = "https://api.linear.app/graphql";
const PRIORITIES = new Map([
  ["none", 0],
  ["urgent", 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 · scripts/linear.mjs (reported line 6)May include surrounding context.

js
// Linear GraphQL helper - native Node.js, zero dependencies.
// Requires Node 18+ for global fetch. Reads LINEAR_API_KEY from the process environment only.

const ENDPOINT = "https://api.linear.app/graphql";
const PRIORITIES = new Map([
  ["none", 0],
  ["urgent", 1],

Static analysis

Detected: suspicious.env_credential_access

Environment variable access combined with network send.

Critical
Code
suspicious.env_credential_access
Location
scripts/linear.mjs:35