CVE-2026-39987

KEV
Published: Apr 09, 2026 Last Modified: Apr 23, 2026
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 9,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
CRITICAL 9,8
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,5998
Percentile
1,0th
Updated

EPSS Score Trend (Last 17 Days)

306

Missing Authentication for Critical Function

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Other
Potential Impacts:
Gain Privileges Or Assume Identity Varies By Context
Applicable Platforms
Technologies: Cloud Computing, ICS/OT
Likelihood of Exploit: High
View CWE Details
Application

Marimo by Coreweave

Product Information
Vendor Coreweave
Product Marimo
Version Range Affected
To 0.23.0 (exclusive)
cpe:2.3:a:coreweave:marimo:*:*:*:*:*:python:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://www.cisa.gov/known-exploited-vulnerabilities-catalo…
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026…
https://www.sysdig.com/blog/marimo-oss-python-notebook-rce-…
https://www.sysdig.com/blog/marimo-oss-python-notebook-rce-from-disclosure-to-e…
https://github.com/marimo-team/marimo/commit/c24d4806398f30…
https://github.com/marimo-team/marimo/commit/c24d4806398f30be6b12acd6c60d1d7c68…
https://github.com/marimo-team/marimo/pull/9098
https://github.com/marimo-team/marimo/pull/9098
https://github.com/marimo-team/marimo/security/advisories/G…
https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc