gstack-upgrade

MEDIUM W011: Third-party content exposure detected (indirect prompt injection risk).

• Third-party content exposure detected (high risk: 1.00). The skill explicitly clones from the public GitHub repo (git clone https://github.com/garrytan/gstack.git in Step 4 for vendored installs) and runs ./setup and later reads $INSTALL_DIR/CHANGELOG.md (Step 6), so it fetches and ingests untrusted, third‑party content that can directly change behavior and influence subsequent actions.

MEDIUM W012: Unverifiable external dependency detected (runtime URL that controls agent).

• Potentially malicious external URL detected (high risk: 0.90). The skill performs a runtime git clone from https://github.com/garrytan/gstack.git (and also runs git fetch/reset on installed git checkouts) and then runs the repository's ./setup, which fetches and executes remote code during the upgrade process — this remote content can directly control behavior or execute arbitrary code.