CVE-2026-77601

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.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: HIGH
CVSS score: 8.8 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Effective score: 8.8 / 10 HIGH source: CNA overview
CWE(s): CWE-78
Reserved: 2026-08-20
Published: 2026-09-23 18:50 UTC
Last updated: 2026-09-23 19:28 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/77xxx/CVE-2026-77601.json
Linked Threat: CVE-2026-77601 — OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 19:19:18 UTC
NVD last modified: 2026-09-23 20:17:16 UTC
NVD CVSS v3.1: 8.8 / 10 HIGH source: security-advisories@github.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 2.8 / 10
Impact subscore: 5.9 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85563

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Affected products (1)

Vendor	Product	Versions	Platforms
OpenC3	cosmos	`>= 5.12.0, < 7.3.0` (affected)	—

Vendor references (3)

References embedded in the original CVE record by the assigning CNA.

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

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (4)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/OpenC3/cosmos/commit/be70d1d836c83c3b084e768e31a399312d4cbe0b security-advisories@github.com
https://github.com/OpenC3/cosmos/pull/3489 security-advisories@github.com
https://github.com/OpenC3/cosmos/security/advisories/GHSA-vp3w-52v9-q57f security-advisories@github.com
https://github.com/OpenC3/cosmos/security/advisories/GHSA-vp3w-52v9-q57f 134c704f-9b21-4f2e-91b3-4a467353bcc0

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2026-77601 - Vulnerability Details - OpenCVE

web:app.opencve.io

The vulnerability allows a well‑authenticated actor to inject shell metacharacters into the custom pypi_url setting. During plugin installation, the setting value is directly interpolated into a shell command, giving the attacker the ability to execute arbitrary operating‑system commands with the privileges of the openc3 service user. This can lead to disclosure of Redis credentials and ...

2026-09-24 11:12 UTC
CVE-2026-77601: OpenC3 Cosmos Vulnerability (CVSS 8.8) | CVETodo

web:cvetodo.com

CVE-2026-77601 is a CVSS 8.8 high-severity vulnerability in OpenC3 Cosmos. Includes technical details, affected versions, and mitigation steps.

2026-09-24 11:12 UTC
Adobe Security Bulletin

web:helpx.adobe.com

Adobe has released a security update for Adobe Acrobat and Reader for Windows and macOS. This update addresses critical, important, and moderate vulnerabilities that could result in arbitrary code execution, privilege escalation, arbitrary file system read, arbitrary file system write, memory exposure, and application denial-of-service. Adobe is not aware of any exploits in the wild for any of ...

2026-09-24 11:12 UTC
Microsoft January 2026 Security Updates (FYI) - Microsoft Q&A

web:learn.microsoft.com

January 2026 Security Updates This release consists of the following 112 Microsoft CVEs : Tag CVE Base Score CVSS Vector Exploitability FAQs? Workarounds? Mitigations ? Windows Deployment Services CVE - 2026 -0386 SQL Server CVE - 2026 -20803 Windows Hello…

2026-09-24 11:12 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-24 11:12 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-24 11:12 UTC
About the security content of iOS 26.7 and iPadOS 26.7

web:support.apple.com

This document describes the security content of iOS 26.7 and iPadOS 26.7.

2026-09-24 11:12 UTC
Description of the security update for Office 2016: August 11, 2026 ...

web:support.microsoft.com

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home. (See What version of Office am I using?) How to get and install the update Method 1: Microsoft Update This update is available from Microsoft Update. When you turn on ...

2026-09-24 11:12 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-24 11:12 UTC
CVE-2026-77601 | Tenable®

web:www.tenable.com

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 ...

2026-09-24 11:12 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-77601.json.

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