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Vulnerability record · CVE-2026-77601 · published 23 September 2026

CVE-2026-77601: OS command injection vulnerability

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.

8.8 CVSS 3.1 High EPSS 0.58% · top 54.5% CWE-78 · OS command injection Deferred
8.8CVSS 3.1 base score
0.58%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
23 Sep 2026Last modified by NVD

Description

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.

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

References

LinkTags
https://github.com/OpenC3/cosmos/commit/be70d1d836c83c3b084e768e31a399312d4cbe0b
https://github.com/OpenC3/cosmos/pull/3489
https://github.com/OpenC3/cosmos/security/advisories/GHSA-vp3w-52v9-q57f
https://github.com/OpenC3/cosmos/security/advisories/GHSA-vp3w-52v9-q57f

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Source: NIST National Vulnerability Database (record CVE-2026-77601), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.