T08 · Insecure Dependencies
- Location
SKILL.md:258- Finding
Unpinned Third-Party Package Installation and Execution
- Content
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Vulnerability Details
File Location:
SKILL.md, lines 258-259
Vulnerability Type: Unpinned and insufficiently verified third-party dependencies
Risk Level: MediumVulnerable Code Snippet
markdown | Storybook | Component documentation | Recommended | npx storybook init | | Style Dictionary | Token management | Recommended | npm install style-dictionary |The executable commands from the original snippet are:
bash npx storybook init npm install style-dictionaryTechnical Analysis
The documentation recommends retrieving npm dependencies without specifying reviewed versions or requiring integrity verification. In particular,
npx storybook initcan resolve a package from the configured npm registry, download it, and immediately execute its command-line entry point.Because no version is pinned, the effective code executed by users can change after this skill has been reviewed. The instructions also do not require a committed lockfile, registry allowlist, checksum validation, provenance verification, or disabled installation scripts.
Although no malicious package is included in the audited project and no current compromise of either named dependency was established, this installation pattern creates a supply-chain exposure. A compromised package release, registry account, dependency chain, DNS or registry configuration, or local npm configuration could cause arbitrary package code to run.
Attack Path
- A user follows the dependency setup instructions in
SKILL.md. npxornpmcontacts the configured package registry.- The package manager resolves a mutable, unpinned package version and its transitive dependencies.
- Package CLI code or applicable installation lifecycle scripts execute locally.
- If any resolved component is malicious or compromised, it executes with the permissions of the user running the command.
- The malicious component could access pr ...[truncated 761 chars]
- A user follows the dependency setup instructions in
- Remediation
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Remediation Suggestions
- Pin every direct tool to a specifically reviewed version, for example by invoking
npx --no-installagainst a dependency already declared in the project. - Declare dependencies in
package.jsonand commit a reviewed lockfile such aspackage-lock.json. - Use
npm cifor reproducible installation rather than resolving new versions during each invocation. - Configure an approved registry and reject unexpected package sources.
- Review transitive dependencies and package provenance before upgrading.
- Use package integrity data from the lockfile and enable available signature or provenance verification.
- Disable lifecycle scripts with
--ignore-scriptswhere they are not required. If scripts are required, document and review them explicitly. - Run package installation and generation in an isolated, nonprivileged environment with restricted credentials and network access.
- Add an explicit warning that npm and
npxcommands must never be run as an administrator or root user.
- Pin every direct tool to a specifically reviewed version, for example by invoking
