Improper File Name Restriction in GitHub Copilot

Executive Summary

CVE-2026-50510 is a vulnerability in GitHub Copilot caused by improper restriction of names for files and other resources. This flaw allows an unauthorized attacker to execute code locally on a victim's system.

The vulnerability is classified as a remote code execution (RCE) issue with a severity rating of 'Important.' It has a CVSS v3.1 base score of 7.8, indicating a high impact on confidentiality, integrity, and availability.

The attack vector is local (AV:L), meaning the attacker must have some level of access to the target system, and user interaction is required (UI:R) for exploitation.

Useful 0 Not Useful 0

Detection Guidance

The provided context does not specify methods or commands to detect this vulnerability on a network or system. Detection may involve checking for unauthorized or maliciously named files or resources associated with Github Copilot, but no explicit detection steps are outlined.

You may need to refer to vendor documentation or security advisories for specific detection tools or commands. Monitoring for unusual file names or resource access patterns in environments where Github Copilot is used could be a starting point.

Useful 0 Not Useful 0

Impact Analysis

If exploited, this vulnerability could have several impacts on you or your organization:

• An attacker could execute arbitrary code on your local machine, potentially gaining control over it.
• Sensitive data stored on the affected system could be accessed, modified, or stolen.
• The attacker could install malware, backdoors, or other malicious software, leading to further compromise.
• The integrity of your development environment or projects using GitHub Copilot could be compromised, leading to supply chain attacks or code tampering.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could impact compliance with several standards and regulations, depending on the context of its exploitation:

• GDPR (General Data Protection Regulation): If the vulnerability leads to unauthorized access or exfiltration of personal data, it could result in a breach of GDPR requirements, particularly Articles 5 (data protection principles) and 32 (security of processing). Organizations may face fines or legal consequences if they fail to protect personal data adequately.
• HIPAA (Health Insurance Portability and Accountability Act): If the affected system processes or stores protected health information (PHI), exploitation of this vulnerability could lead to a breach of HIPAA's Security Rule, which mandates safeguards for electronic PHI. This could result in penalties or corrective action plans.
• Other industry standards (e.g., ISO 27001, NIST): The vulnerability could indicate a failure to implement proper access controls or secure coding practices, potentially violating requirements for risk management and system integrity.

Organizations should assess whether the vulnerability exposes them to compliance risks and take remediation steps to mitigate potential violations.

Useful 0 Not Useful 0

Mitigation Strategies

The provided context does not detail specific mitigation steps for CVE-2026-50510. However, general best practices for mitigating similar vulnerabilities include:

• Apply any available patches or updates provided by Microsoft or Github Copilot as soon as they are released.
• Restrict access to Github Copilot to authorized users only and monitor for unusual activity.
• Review and enforce strict naming conventions for files and resources to prevent improper restrictions from being exploited.
• Follow the Microsoft Security Response Center (MSRC) guidance for this CVE, which may include additional mitigation steps or workarounds.

Useful 0 Not Useful 0