CVE-2026-42088CWE-250

OpenC3 COSMOS: Administrative Actions via the Script Runner Tool

Critical · published May 4, 2026

CVSS v3.1
9.6
EPSS
0%
Percentile
41.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00492 · 41.4th percentile
Weakness
CWE-250 · Execution with Unnecessary Privileges
Published
2026-05-04T17:21Z
EPSS history
Timeline
  • 04 MAY 17:21Z
    OpenC3 COSMOS: Administrative Actions via the Script Runner Tool
    cvelistv5