A severe remote code execution vulnerability has been identified in GitHub's infrastructure, designated as CVE-2026-3854 with a critical CVSS score of 8.7. This security flaw could be triggered through a simple git push command, potentially allowing attackers to execute arbitrary code and gain unauthorized access across multiple tenant repositories. The discovery highlights significant risks to millions of development projects hosted on the platform, emphasizing the urgent need for immediate patching and security updates.

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