GitHub fixes RCE flaw that gave access to millions of private repos
In early March, GitHub patched a critical remote code execution vulnerability (CVE-2026-3854) that could have allowed attackers to access millions of private repositories. [...]
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Background for this topic.
Remote Code Execution (RCE) is a cybersecurity vulnerability that allows an attacker to run arbitrary code on another computer or server over a network. This type of attack can give the perpetrator unauthorized access to take control of the affected system. In the context of information security, RCE represents a significant threat because it can compromise data integrity, confidentiality, and availability within a system or network. Attackers may exploit RCE vulnerabilities to steal sensitive information, disrupt services, or spread malware. Addressing RCE vulnerabilities is critical for maintaining secure systems and protecting against potential breaches.
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In early March, GitHub patched a critical remote code execution vulnerability (CVE-2026-3854) that could have allowed attackers to access millions of private repositories. [...]
Cybersecurity researchers have disclosed details of a critical security vulnerability impacting GitHub.com and GitHub Enterprise Server that could allow an authenticated user to obtain remote code execution with a single "git push" command