OpenC3 COSMOS up to 7.2.x ConfigParser run_suite_analysis.rb privileges management

Summaryinfo

A vulnerability labeled as critical has been found in OpenC3 COSMOS up to 7.2.x. The affected element is an unknown function of the file openc3-cosmos-script-runner-api/scripts/run_suite_analysis.rb of the component ConfigParser/PacketConfig/GENERIC_READ_CONVERSION/GENERIC_WRITE_CONVERSION. Such manipulation leads to privileges management. This vulnerability is listed as CVE-2026-77602. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in OpenC3 COSMOS up to 7.2.x and classified as critical. Affected by this issue is an unknown part of the file openc3-cosmos-script-runner-api/scripts/run_suite_analysis.rb of the component ConfigParser/PacketConfig/GENERIC_READ_CONVERSION/GENERIC_WRITE_CONVERSION. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.1.0 until 7.3.0, authenticated non-administrator users can write content under targets_modified/ that is later executed by multiple configuration paths below the intended code-execution privilege tier. Table and command or telemetry definitions are processed through ConfigParser, PacketConfig, GENERIC_READ_CONVERSION, or GENERIC_WRITE_CONVERSION, allowing ERB rendering or Ruby and Python evaluation, while openc3-cosmos-script-runner-api/scripts/run_suite_analysis.rb executes suite procedure files through require. Storage uploads, screen saves, and script creation can place content in the overlay, and triggering table processing, a cmd/tlm reload, or suite analysis executes the content in cmd-tlm-api, decom microservices, or Script Runner with access to internal credentials and data. This issue is fixed in version 7.3.0.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-77602 since 08/20/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 7.3.0 eliminates this vulnerability.

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Productinfo

Vendor

• OpenC3

Name

• COSMOS

Version

• 7.0
• 7.1
• 7.2

Website

• Product: https://github.com/OpenC3/cosmos/

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