CVE-2026-77601

8.8 HIGHpublic exploit available

Published 2026-09-23 · Updated 2026-09-23

AI risk analysis

Summary: The flaw allows an authenticated actor to write a malicious setting that can execute arbitrary shell commands, leading to Remote Code Execution (RCE).
Exploitability: Exploitation is moderately hard as it requires authentication and specific knowledge of the setting to manipulate. Precondition is an authenticated user with write access to the pypi_url setting.
Blast radius: If exploited, the impact is high, as it can lead to full control over the system, including access to Redis and bucket credentials.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to OpenC3 version 7.3.0 or later.

rceauth-bypassweb

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

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 vector

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

Weaknesses

CWE-78

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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