TI-2026-54089 Aliases CVE-2026-77601 GHSA-vp3w-52v9-q57f

OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting

HIGH 73CWE-78Published 2026-09-23 · Updated 2026-09-23

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

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-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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00628 50th percentileScored 2026-11-07

Fix Fixed cosmos (OpenC3): 7.3.0openc3 (RubyGems): 7.3.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OpenC3	cosmos	5.12.0 to before 7.3.0	7.3.0	Patch available	CNA
—	openc3 (RubyGems)	5.12.0 to before 7.3.0	7.3.0	Patch available	GHSA-vp3w-52v9-q57f

cosmos VendorOpenC3 Affected 5.12.0 to before 7.3.0 Fixed in 7.3.0 Patch available CNA
openc3 (RubyGems) Vendor— Affected 5.12.0 to before 7.3.0 Fixed in 7.3.0 Patch available GHSA-vp3w-52v9-q57f

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:openc3:cosmos::::::::	—	—	OpenC3

cpe:2.3:a:openc3:cosmos:*:*:*:*:*:*:*:* Versions — — ·OpenC3

Remediation

Fix · CNA cosmos (OpenC3) Fixed in 7.3.0
Fix · GHSA-vp3w-52v9-q57f openc3 (RubyGems) Fixed in 7.3.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-77601
2026-10-03 Alias added: GHSA-vp3w-52v9-q57f
2026-10-29 EPSS moved to the 50th–90th percentile

References

Other 5

TI-2025-20781 Weak password requirements in OpenC3 COSMOS v6.0.0 allow attackers to bypass authentication via a brute force attack. CVSS 3.1CRITICAL 9.8
TI-2025-20780 OpenC3 COSMOS before v6.0.2 was discovered to contain hardcoded credentials for the Service Account. CVSS 3.1CRITICAL 9.8
TI-2025-20779 A remote code execution (RCE) vulnerability in the Plugin Management component of OpenC3… CVSS 3.1CRITICAL 9.8
TI-2025-20778 An issue in the /script-api/scripts/ endpoint of OpenC3 COSMOS before 6.1.0 allows… CVSS 3.1CRITICAL 9.1
TI-2026-54090 Code injection in OpenC3 cosmos CVSS 3.1CRITICAL 9.9
TI-2026-30456 OpenC3 COSMOS: Administrative Actions via the Script Runner Tool CVSS 3.1CRITICAL 9.6

See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences