CVE-2026-39987

N/A

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.

CVE Details

CVSS v3.1 ScoreN/A

Published4/9/2026

Last Modified4/13/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-306

References

https://github.com/marimo-team/marimo/commit/c24d4806398f30be6b12acd6c60d1d7c68cfd12a(security-advisories@github.com)

https://github.com/marimo-team/marimo/pull/9098(security-advisories@github.com)

https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc(security-advisories@github.com)

IOC Correlations

No correlations recorded

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