CVE-2026-77601Network attack vectorHinoki check available

Authenticated OS command injection via pypi_url setting

Published Sep 23, 2026 · Updated Sep 23, 2026

OS command injection in OpenC3 COSMOS 5.12.0 and later before 7.3.0 allows remote authenticated users to run commands through pypi_url. OpenC3::PluginModel.install_phase2 interpolates the writable setting into a shell command while installing a plugin with Python dependency metadata, causing shell metacharacters to execute as the service user. Any authenticated Core user can reach the required operations; Enterprise access requires an administrator, and executed commands can access Redis and bucket credentials.

CVSS severityUnavailable
Unscored
EPSS probability0.58%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in OpenC3 COSMOS 5.12.0 and later before 7.3.0 allows remote authenticated users to run commands through pypi_url. OpenC3::PluginModel.install_phase2 interpolates the writable setting into a shell command while installing a plugin with Python dependency metadata, causing shell metacharacters to execute as the service user. Any authenticated Core user can reach the required operations; Enterprise access requires an administrator, and executed commands can access Redis and bucket credentials.

The record

CVE
CVE-2026-77601
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
OpenC3
Product
COSMOS
Classifications
T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 5.12.0, < 7.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenC3 · COSMOSversion=>= 5.12.0, < 7.3.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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