CVE-2026-39987
Published: Apr 9, 2026
Modified: Apr 24, 2026
Description
marimo is a reactive Python notebook. Prior to 0.23.0, Marimo has a Pre-Auth RCE vulnerability. The terminal WebSocket endpoint /terminal/ws lacks authentication validation, allowing an unauthenticated attacker to obtain a full PTY shell and execute arbitrary system commands. Unlike other WebSocket endpoints (e.g., /ws) that correctly call validate_auth() for authentication, the /terminal/ws endpoint only checks the running mode and platform support before accepting connections, completely skipping authentication verification. This vulnerability is fixed in 0.23.0.
| Vendor | Product | Versions |
|---|---|---|
marimo-team | marimo | affected < 0.23.0 |
Weaknesses (CWE)
References
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