CVE-2026-77601
OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.12.0 until 7.3.0, an authenticated actor can write the pypi_url setting through set_setting at POST /openc3-api/api, then cause OpenC3::PluginModel.install_phase2 in openc3/lib/openc3/models/plugin_model.rb to interpolate the value into a shell command while installing a plugin with Python dependency metadata. Shell metacharacters in the setting are interpreted by the command shell, allowing arbitrary operating-system commands to run as the openc3 service user with access to Redis and bucket credentials. Open-source deployments permit any authenticated user to reach the affected operations, while Enterprise deployments require an administrator. This issue is fixed in version 7.3.0.
| CWE | CWE-78 |
| Vendor | openc3 |
| Product | cosmos |
| Published | Sep 23, 2026 |
| Last Updated | Sep 23, 2026 |
Get instant alerts for openc3 cosmos
Be the first to know when new high vulnerabilities affecting openc3 cosmos are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H