Versioned security assessment

Report ID: SA-26421118

7/9/2026, 2:10:36 PM

next-upgrade security assessment v5

Skill Security Certification Report

Audit History
Audit model: codex Historical report
Skill name
next-upgrade
Version
v5
Maintainer
vercel-labs
Source
github.com/vercel-labs/next-skills/tree/main/skills/next-upgrade/
Coverage
1 Files scanned · 50 Lines analyzed
Policy version
Unavailable

Highest confirmed finding severity

Medium

1 confirmed security finding requires attention.

Installation context

Historical evidence

This report may not describe the currently installable artifact. Open the current Skill page for install guidance.

Open current Skill page

This report does not block or authorize the manifest or ZIP.

The skill is a normal Next.js upgrade workflow and contains no prompt injection or data-exfiltration language. The main risk is that it instructs agents to run unpinned npm and npx commands plus project scripts, which can execute third-party or repository-controlled code. The hardcoded URLs point to official Next.js documentation and are not suspicious.

Report position

Historical report

Open audit history before using this report to install.

Audit attestation

Not attestable

The required immutable binding is incomplete.

Human verification

Not verified

No human verification is recorded for this report.

Coverage

1 Files scanned · 50 Lines analyzed

5 items shown for review

Limitations

This report does not claim runtime or sandbox execution and does not prove the absence of side effects.

Evidence chain

Follow the evidence from source binding to the install contract. Available evidence supports verification; it is not a safety guarantee.

  1. Source

    Binding unavailable

  2. Artifact

    Identity incomplete

  3. Audit

    Complete

  4. Install contract

    Open manifest to verify

    Open manifest

Capabilities observed

Observed means this report recorded supporting evidence. Not recorded does not prove that a capability is absent.

Contains scripts

May execute code included with the Skill.

Not recorded by this audit

Network access

May connect to external services.

Observed in 3 evidence locations

Filesystem access

May read or write local files.

Not recorded by this audit

Env variables

May read values from the process environment.

Not recorded by this audit

External commands

May invoke commands or programs outside the Skill.

Observed in 12 evidence locations

Capability review items (4)
Medium
SKILL.md:24-26
Ruby/shell backtick execution
```bash
The fenced command shows npx @next/codemod@latest, which downloads and executes a package from npm. This is legitimate migration tooling, but it can run third-party code and needs user approval.
Medium
SKILL.md:33-35
Ruby/shell backtick execution
```bash
The fenced command tells the agent to run npm install next@latest react@latest react-dom@latest. Package installation can execute lifecycle scripts and changes project dependencies.
Medium
SKILL.md:43-45
Ruby/shell backtick execution
```bash
The fenced command instructs npm install for @types packages with @latest. It changes dependencies and should be gated by user confirmation.
Medium
SKILL.md:48-49
Ruby/shell backtick execution
- Run `npm run build` to check for build errors
The instruction asks the agent to run npm run build and npm run dev. Those execute project-defined scripts, which is useful for validation but can run arbitrary repository code.

Risk findings

Confirmed security concerns are separated from items that still need review.

Confirmed security concerns (1)

RISK-001 Medium
SKILL.md:25SKILL.md:34SKILL.md:44
Unpinned Package Execution in Upgrade Workflow
The workflow uses @latest package invocations for codemods and dependency upgrades. This can execute newly published package code or install unexpected major versions without pinning.
The referenced lines explicitly use npm or npx with @latest. The risk is supply-chain exposure from executing or installing unpinned registry packages.

Remediation

Suggested fixes recorded by this audit. Applying them is the maintainer’s responsibility.

  1. FIX-001
    Medium
    Unpinned codemod execution
    Ask for user confirmation before npx execution and prefer pinned @next/codemod versions after checking the official guide.
  2. FIX-002
    Medium
    Dependency upgrades use @latest
    Resolve target versions from the migration guide and present dependency changes before installing packages.
  3. FIX-003
    Medium
    Project scripts may execute repository code
    Show the scripts that npm run build and npm run dev will execute, then request user approval.
  4. FIX-004
    Low
    External documentation fetches are required
    Keep WebFetch limited to official Next.js documentation and avoid sending project source or secrets in requests.

Expert evidence

Immutable subject identity, scanner metadata, dismissed matches, and source-level evidence.

Artifact subject

Marketplace commit
Unavailable
Content hash
Unavailable
Tree hash
Unavailable
Skill path
Unavailable
Audit payload hash
Unavailable

Analysis metadata

Audit model: codex

Analysis state: Complete

Scope is limited to the recorded files, lines, methods, and evidence. No runtime or sandbox execution is claimed.

Verify and export

JSON report CITATION.cff SARIF 2.1.0 Signed installation manifest

The manifest and lockfile bind install artifacts to cryptographic hashes. This integrity claim is separate from the security assessment.

Audit attestation: not_attestable