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CVE-2026-77601— OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting

Quick assessment

Affected
OpenC3 cosmos
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 OpenC

CVSS 8.8 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenC3 cosmos >= 5.12.0, < 7.3.0 affected
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I. Basic Information for CVE-2026-77601

Vulnerability Information

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Vulnerability Title
OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenC3 cosmos >= 5.12.0, < 7.3.0 -

II. Public POCs for CVE-2026-77601

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III. Intelligence Information for CVE-2026-77601

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Other References for CVE-2026-77601 (3)

Same Patch Batch · OpenC3 · 2026-09-23 · 3 CVEs total

CVE-2026-77602 9.9 CRITICAL OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (t
CVE-2026-77394 7.6 HIGH OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget

IV. Related Vulnerabilities

Same product: cosmos
Same vendor: OpenC3
Same weakness: CWE-78

V. Comments for CVE-2026-77601

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