CVE-2026-26009
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Root-Level Remote Code Execution via Template Scripts in Catalyst

Publication date: 2026-02-10

Last updated on: 2026-02-10

Assigner: GitHub, Inc.

Description
Catalyst is a platform built for enterprise game server hosts, game communities, and billing panel integrations. Install scripts defined in server templates execute directly on the host operating system as root via bash -c, with no sandboxing or containerization. Any user with template.create or template.update permission can define arbitrary shell commands that achieve full root-level remote code execution on every node machine in the cluster. This vulnerability is fixed in commit 11980aaf3f46315b02777f325ba02c56b110165d.
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Meta Information
Published
2026-02-10
Last Modified
2026-02-10
Generated
2026-06-16
AI Q&A
2026-02-10
EPSS Evaluated
2026-06-15
NVD
CVE-2026-26009
EUVD
EUVD-2026-6761
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
karutoil catalyst *
karutoil catalyst-agent *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
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Executive Summary

This vulnerability exists in Catalyst, a platform used for enterprise game server hosts, game communities, and billing panel integrations. The issue arises because install scripts defined in server templates execute directly on the host operating system as root via bash -c, without any sandboxing or containerization. This means that any user who has the template.create or template.update permission can define arbitrary shell commands that will run with full root privileges on every node machine in the cluster.

Impact Analysis

The vulnerability allows an attacker with certain permissions to execute arbitrary commands as root on all nodes in the cluster. This can lead to full remote code execution with the highest level of privileges, potentially compromising the entire system, stealing data, disrupting services, or installing malicious software.

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