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Rule Reference

SEC454lintai-ai-securitystablemarkdownwarn

AI markdown: npm http source

AI-native markdown installs JavaScript packages from an insecure direct `http://` source

Provider
lintai-ai-security
Surface
markdown
Scope
per_file
Tier
stable
Severity
warn
Confidence
high
Detection
structural
Remediation
message_only

Activation Model

Preset Membership

This rule is part of the builtin activation graph through these preset memberships.

previewmembership
skillsmembership

Lifecycle

Stable Lifecycle Contract

State

stable_gated

Graduation rationale

Checks AI-native markdown for `npm`, `pnpm`, `yarn`, and `bun` install examples that fetch a direct package source over `http://`.

Deterministic signal basis

MarkdownSignals exact `npm install`, `npm i`, `pnpm add/install`, `yarn add`, or `bun add` token analysis with direct `http://` source detection inside parsed markdown regions, excluding `--registry http://` forms already covered by SEC450.

Malicious corpus
skill-npm-http-source
Benign corpus
skill-npm-https-source-safe
structured evidence required remediation reviewed
Canonical note

Structural stable rule intended as a high-precision check with deterministic evidence.

Nearby Signals

Related Rules

SEC352AI markdown: unscoped Bash tool grantAI-native markdown frontmatter grants unscoped Bash tool accessmarkdownstable
SEC417AI markdown: unpinned pip git installAI-native markdown installs Python packages from an unpinned `git+https://` sourcemarkdownstable
SEC428AI markdown: unsafe Read path grantAI-native markdown frontmatter grants `Read(...)` over an unsafe repo-external pathmarkdownstable
SEC429AI markdown: unsafe Write path grantAI-native markdown frontmatter grants `Write(...)` over an unsafe repo-external pathmarkdownstable
SEC430AI markdown: unsafe Edit path grantAI-native markdown frontmatter grants `Edit(...)` over an unsafe repo-external pathmarkdownstable
SEC431AI markdown: unsafe Glob path grantAI-native markdown frontmatter grants `Glob(...)` over an unsafe repo-external pathmarkdownstable

SEC454 / MD-NPM-HTTP-SOURCE ​

SEC454 flags AI-native markdown when an npm, pnpm, yarn, or bun install example fetches a package directly from http://....

Why It Matters ​

A direct http:// package source removes transport integrity from the package payload itself. In shared AI-native instructions, that turns an insecure supply-chain fetch into copy-pastable setup guidance.

Trigger Shape ​

The rule triggers only when all of these are true:

  • the file is an AI-native markdown instruction surface
  • a parsed markdown region contains npm install, npm i, pnpm install, pnpm add, yarn add, or bun add
  • the same region also contains a direct http:// package source argument

Clean Cases ​

These stay clean:

  • package install examples that fetch the source over https://
  • --registry http://... forms, because those are covered by SEC450
  • unrelated http:// text outside a matching install form

Example Trigger ​

bash
npm install http://registry.example.test/demo.tgz

Safer Example ​

bash
npm install https://registry.example.test/demo.tgz

How To Fix ​

Replace the insecure direct http:// source with a normal TLS-verified https:// source.