CVE-2026-70335 in GitHub Copilot
Summary
by MITRE • 08/12/2026
Improper neutralization of special elements used in an os command ('os command injection') in GitHub Copilot and Visual Studio Code allows an unauthorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 08/12/2026
Command injection vulnerabilities occur when user input is improperly sanitized before being executed as system commands, creating opportunities for attackers to execute arbitrary code on affected systems. This particular vulnerability exists within GitHub Copilot and Visual Studio Code environments where improper neutralization of special elements used in operating system commands allows unauthorized attackers to escalate privileges locally. The flaw stems from insufficient input validation and sanitization mechanisms that fail to properly escape or quote command arguments, enabling malicious actors to inject additional commands through carefully crafted inputs.
The technical implementation of this vulnerability typically involves the exploitation of shell command execution functions where user-supplied data is concatenated directly into system command strings without proper sanitization. When developers or users provide input that contains special shell characters such as semicolons, ampersands, pipes, or backticks, these elements can be interpreted by the underlying operating system shell, allowing attackers to chain multiple commands together. The vulnerability specifically manifests in contexts where Copilot or VS Code components interact with local system processes, potentially through extension mechanisms or integrated terminal features that execute shell commands based on user input or configuration parameters.
Local privilege escalation opportunities arise because the injected commands often execute with the privileges of the user running the vulnerable application, which may include elevated permissions if the development environment operates with administrative rights. Attackers can leverage this to execute malicious payloads such as reverse shells, file manipulation commands, or system reconnaissance tools that gather information about the target system. The impact extends beyond simple command execution as attackers can potentially access sensitive files, modify system configurations, or establish persistent access through the compromised development environment. This vulnerability particularly affects developers working in environments where integrated development tools have elevated privileges or access to system resources.
Mitigation strategies should focus on implementing proper input validation and sanitization techniques that prevent special shell characters from being interpreted as command separators or operators. The principle of least privilege should be enforced by running development environments with minimal required permissions rather than administrative accounts. Additionally, developers should utilize parameterized command execution interfaces that separate command structure from user data, preventing injection attacks through proper escaping mechanisms. Implementation of static analysis tools and runtime monitoring systems can help detect and prevent potentially malicious command construction patterns. Security configurations should include disabling unnecessary shell command execution capabilities in development environments and implementing proper access controls around sensitive system resources.
This vulnerability aligns with common weakness enumeration CWE-78 which specifically addresses improper neutralization of special elements used in operating system commands, and maps to attack techniques within the attack tree framework including privilege escalation through command injection. The remediation approach should incorporate secure coding practices that prevent shell injection vulnerabilities through proper input handling and command execution methodologies. Organizations should also implement comprehensive security awareness training for developers to recognize and avoid patterns that lead to command injection opportunities in development tools and applications.