Versioned security assessment

Report ID: SA-1A0095B7

7/5/2026, 6:37:30 PM

skill-check security assessment v3

Skill Security Certification Report

Audit History
Audit model: codex Historical report
Skill name
skill-check
Version
v3
Maintainer
JckJhns
Source
github.com/JckJhns/skill-check/tree/main/
Coverage
22 Files scanned · 3,439 Lines analyzed
Policy version
Unavailable

Highest confirmed finding severity

High

2 confirmed security findings require 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.

Most static pattern hits are documentation examples, Markdown formatting, or deliberately unsafe eval fixtures rather than active malicious code. No prompt injection evidence was found in the reviewed files. Two semantic risks remain: target script execution in Standard and Deep checks, and unpinned pip installation guidance using --break-system-packages.

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

22 Files scanned · 3,439 Lines analyzed

2 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.

Observed in 5 evidence locations

Network access

May connect to external services.

Observed in 1 evidence location

Filesystem access

May read or write local files.

Observed in 21 evidence locations

Env variables

May read values from the process environment.

Observed in 1 evidence location

External commands

May invoke commands or programs outside the Skill.

Observed in 36 evidence locations

Risk findings

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

Confirmed security concerns (2)

RISK-001 High
references/standard-check.md:16-19references/standard-check.md:59-75
Untrusted Target Script Execution
Standard and Deep workflows instruct the agent to execute scripts from the skill being tested after static review. This can run untrusted code from a user-selected skill directory if the review misses a dangerous pattern.
The guide explicitly runs scripts from the target skill and only requires a warning when Critical findings were detected. This is a real execution risk for untrusted skills, although it supports the testing purpose.
RISK-002 High
references/mock-files.md:33-53
Unpinned Package Installation With System Package Override
Mock generation guidance tells the agent to install third-party packages with pip and --break-system-packages when binary formats are needed. This can modify the host Python environment and exposes users to dependency supply-chain risk.
The dependency section directly recommends pip install commands without pinning, hashes, virtual environments, or mandatory user confirmation. The --break-system-packages flag increases the environment modification risk.

Remediation

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

  1. FIX-001
    High
    Untrusted target scripts can be executed during Standard and Deep checks.
    Require explicit user confirmation before every target script execution, run scripts in a sandbox, and disable network access unless requested.
  2. FIX-002
    High
    Mock dependency guidance installs packages with --break-system-packages.
    Use a virtual environment, pin package versions, avoid --break-system-packages, and ask before installing any dependency.
  3. FIX-003
    Medium
    Dangerous fixture scripts are bundled as normal Python files under evals.
    Keep insecure fixtures clearly labeled, do not execute them in evals, and add guard comments near each dangerous function.

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.

Static false positives ignored (1)
Critical
references/quick-check.md:306
SSH directory access
- Writing to sensitive paths: `/etc/`, `/usr/`, `~/.ssh/`, `~/.config/`, system dirs
Force-confirmed sensitive/critical static finding; AI dismissal overridden.

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