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CVE-2026-42088— OpenC3 COSMOS: Administrative Actions via the Script Runner Tool

CVSS 9.6 · Critical EPSS 0.03% · P8
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I. Basic Information for CVE-2026-42088

Vulnerability Information
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Vulnerability Title
OpenC3 COSMOS: Administrative Actions via the Script Runner Tool
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to version 7.0.0-rc3, the Script Runner widget allows users to execute Python and Ruby scripts directly from the openc3-COSMOS-script-runner-api container. Because all the docker containers share a network, users can execute specially crafted scripts to bypass the API permissions check and perform administrative actions, including reading and modifying data inside the Redis database, which can be used to read secrets and change COSMOS settings, as well as read and write to the buckets service, which holds configuration, log, and plugin files. These actions are normally only available from the Admin Console or with administrative privileges. Any user with permission to create and run scripts can connect to any service in the docker network. This issue has been patched in version 7.0.0-rc3.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
带着不必要的权限执行
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenC3 COSMOS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenC3 COSMOS是OpenC3开源的一个应用程序。 OpenC3 COSMOS 7.0.0-rc3之前版本存在安全漏洞，该漏洞源于Script Runner部件允许用户执行Python和Ruby脚本，可能导致用户绕过API权限检查并执行管理操作，包括读取和修改Redis数据库数据以及读写存储桶服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

VendorProductAffected VersionsCPESubscribe
OpenC3cosmos < 7.0.0-rc3 -

II. Public POCs for CVE-2026-42088

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III. Intelligence Information for CVE-2026-42088

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Same Patch Batch · OpenC3 · 2026-05-04 · 5 CVEs total

CVE-2026-420879.6 CRITICALOpenC3 COSMOS: SQL Injection in QuestDB Time-Series Data Base
CVE-2026-420848.1 HIGHOpenC3 COSMOS: Hijacked session token can be used to reset password for persistence
CVE-2026-420864.6 MEDIUMOpenC3 COSMOS: Self-XSS in the Command Sender
CVE-2026-420854.3 MEDIUMOpenC3 COSMOS: Arbitrary write to plugins directory via path-traversed config filenames

IV. Related Vulnerabilities

Same product: cosmos
Same vendor: OpenC3
Same weakness: CWE-250

V. Comments for CVE-2026-42088

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