T08 · Insecure Dependencies
Warning
- Location
- auth.md:38
- Finding
- Mutable Prerelease Authentication Dependency## Vulnerability Details **File Location**: `auth.md`, lines 38–40 **Vulnerability Type**: Supply-chain risk from an unpinned prerelease dependency **Risk Level**: Medium **Vulnerable Code Snippet**: ```markdown ### Installation ```bash npm install next-auth@beta ``` ``` ### Technical Analysis The Skill recommends installing `next-auth` through the mutable `beta` distribution tag rather than an exact, reviewed version. The package version selected by this command can therefore change after the Skill has been audited, making installation behavior non-reproducible. This dependency is particularly security-sensitive because it participates in credential verification, OAuth integration, session creation, and authorization decisions. Running `npm install` can also execute lifecycle scripts from the selected package or its transitive dependencies in the context of the user's project. This finding does not establish that the current `next-auth` beta package is malicious. The vulnerability is the unsafe dependency-selection practice: a future defective or compromised prerelease could be installed without any corresponding change to the reviewed Skill. ### Attack Path 1. A user or agent follows the authentication setup instructions in `auth.md`. 2. The command `npm install next-auth@beta` asks the npm registry to resolve the package currently associated with the mutable `beta` tag. 3. The resolved release or one of its transitive dependencies has been compromised, contains a malicious lifecycle script, or introduces a security regression. 4. During installation, any applicable lifecycle code executes with the permissions of the user running npm and can access the project workspace and environment available to that process. 5. The dependency subsequently executes within the application's authentication boundary, potentially affecting credentials, OAuth tokens, sessions, or authorization decisions. ### Impact Assessment ...[truncated 732 chars]
- Remediation
- ## Remediation Suggestions 1. Replace the mutable prerelease tag with an exact version that has been reviewed and tested, for example: ```bash npm install --save-exact next-auth@<reviewed-version> ``` 2. Commit the generated lockfile and use `npm ci` in CI and deployment workflows to enforce reproducible dependency resolution. 3. Require explicit user confirmation before running package-installation commands generated from the Skill. 4. Review release notes, known vulnerabilities, provenance, and package integrity before upgrading the pinned version. 5. Use automated dependency scanning and lockfile review for both direct and transitive dependencies. 6. Where operationally feasible, disable unnecessary npm lifecycle scripts during initial validation with `--ignore-scripts`, then explicitly permit only required installation behavior after review. 7. Prefer a stable release rather than a beta release unless the documented Next.js/Auth.js integration specifically requires prerelease functionality.