---
id: CVE-2026-77601
title: >-
  OpenC3 COSMOS provides the functionality needed to send commands to and
  receive data from one or more embedded systems
summary: >-
  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-ap…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
vendor: OpenC3
product: cosmos
affected:
  - 'cosmos >= 5.12.0, < 7.3.0'
patched:
  - openc3 7.3.0
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T20:17:16.027'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77601'
references:
  - url: >-
      https://github.com/OpenC3/cosmos/commit/be70d1d836c83c3b084e768e31a399312d4cbe0b
    label: security-advisories@github.com
  - url: 'https://github.com/OpenC3/cosmos/pull/3489'
    label: security-advisories@github.com
  - url: 'https://github.com/OpenC3/cosmos/security/advisories/GHSA-vp3w-52v9-q57f'
    label: security-advisories@github.com
  - url: 'https://github.com/OpenC3/cosmos/security/advisories/GHSA-vp3w-52v9-q57f'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/OpenC3/cosmos/releases/tag/v7.2.1'
  - url: 'https://github.com/advisories/GHSA-vp3w-52v9-q57f'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - rubygems
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-23T19:28:30.534617Z'
aliases:
  - GHSA-vp3w-52v9-q57f
ecosystem: rubygems
ingestedAt: '2026-09-23T19:31:04.467Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-77601)

Affected packages:

- `openc3 >= 5.12.0, <= 7.2.1`

Patched in:

- `openc3 7.3.0`

Source: https://github.com/advisories/GHSA-vp3w-52v9-q57f