CVE-2026-42088

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.

CVSS 3.1

8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-26)

CWE

CWE-250

Published

2026-05-04

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• openc3:cosmos

Packages (OSV)

References

• https://github.com/OpenC3/cosmos/releases/tag/v7.0.0
• https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3
• https://github.com/OpenC3/cosmos/security/advisories/GHSA-2wvh-87g2-89hr
• https://github.com/OpenC3/cosmos/security/advisories/GHSA-2wvh-87g2-89hr

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