open-gstack-browser
Launch GStack Browser — AI-controlled Chromium with the sidebar extension baked in.
Security
2 findings — 2 medium severity. This skill can be installed but you should review these findings before use.
W011: Third-party content exposure detected (indirect prompt injection risk)
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
Third-party content exposure detected (high risk: 0.75). The skill launches a headed Chromium instance and then uses the browser-side “sidebar agent” to navigate and read page content (e.g., Step 4 loads `https://news.ycombinator.com` and the extension can extract/read arbitrary page text), which is outsider-authored free text that can be ingested into the agent’s LLM context via the extension’s chat/feed.
W012: Unverifiable external dependency detected (runtime URL that controls agent)
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
Potentially malicious external URL detected (high risk: 0.80). The skill's setup step may run at runtime: it downloads and executes a remote installer script via curl -fsSL "https://bun.sh/install" and then runs it with bash (after a checksum check), so https://bun.sh/install is a runtime external dependency that executes remote code.
- Repository
- garrytan/gstack
- Commit
19770ea
- Audited
- Security analysis
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