gemini-cli - 💡(How to fix) Fix Data Leakage via Unauthenticated DevTools SSE [1 comments, 2 participants]

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google-gemini/gemini-cli#26824Fetched 2026-05-11 03:27:23
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What happened?

The /events endpoint in DevTools provides a full snapshot of network and console logs upon connection and does not perform any authentication or strict origin validation.

What did you expect to happen?

SSE connections should require authentication and strictly validate the Origin header to prevent cross-site data exfiltration.

Client Information

<details> <summary>Client Information</summary>

OS: linux Date: Sunday, May 10, 2026 Gemini CLI: 0.42.0-nightly

</details>

Login information

Automated audit with Gemini CLI.

Anything else we need to know?

File: packages/devtools/src/index.ts, Lines 160-192. A malicious website running in the same browser could connect to 127.0.0.1:25417/events and steal sensitive logs, including API keys or code snippets.

Severity: High Area: area/security

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gemini-cli - 💡(How to fix) Fix Data Leakage via Unauthenticated DevTools SSE [1 comments, 2 participants]