CVE-2026-118869 in SHIRASAGI
Summary
by MITRE • 11/05/2026
An OS command injection vulnerability exists in SHIRASAGI, which may allow an authenticated attacker to execute arbitrary OS commands on the system running the product.
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Analysis
by VulDB Data Team • 11/05/2026
The identified vulnerability represents a critical security flaw within the SHIRASAGI software environment, classified fundamentally as an Operating System Command Injection issue. This type of weakness occurs when an application constructs operating system commands using input that has been supplied by users without adequate validation or sanitization. In this specific instance, the attack vector requires authentication, meaning that only authorized individuals with valid credentials can exploit this flaw. While the requirement for prior authentication may limit the pool of potential attackers compared to unauthenticated remote code execution vulnerabilities, it does not mitigate the severity of the impact once access is gained. The presence of an authenticated entry point suggests that internal threats or compromised user accounts pose a significant risk vector against the integrity and availability of the system hosting SHIRASAGI.
From a technical perspective, command injection flaws typically arise when developer code passes unsanitized input directly to shell interpreters such as /bin/sh on Unix-like systems or cmd.exe on Windows environments. The vulnerability likely stems from improper handling of user-supplied data within one or more functions responsible for executing system-level tasks. When the application fails to distinguish between executable commands and malicious payloads embedded in parameters, it allows an attacker to inject additional shell metacharacters such as semicolons, pipes, or ampersands. These characters enable the chaining of arbitrary commands that execute with the same privileges as the SHIRASAGI process itself. This lack of input validation violates fundamental secure coding principles where all external data must be treated as hostile until proven otherwise through rigorous filtering and type checking mechanisms.
The operational impact of this vulnerability is severe, potentially leading to full system compromise. An authenticated attacker who successfully exploits this command injection flaw can execute arbitrary operating system commands with the privileges assigned to the SHIRASAGI service account. Depending on how these services are configured, this could range from reading sensitive configuration files and database credentials to modifying application logic or installing persistent backdoors. In worst-case scenarios where the service runs with elevated permissions such as root or SYSTEM access, the attacker gains complete control over the underlying operating system. This enables lateral movement within a network infrastructure, exfiltration of confidential data, disruption of critical business operations through denial-of-service actions, and further exploitation of other connected systems that trust the compromised host.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-78, which specifically defines Improper Neutralization of Special Elements used in an OS Command known as OS Command Injection. Furthermore, from a tactical perspective relevant to threat intelligence frameworks like MITRE ATT&CK, this exploit technique falls under T1059 Command and Scripting Interpreter. Attackers frequently leverage such interpreters during the execution phase of an intrusion to run malicious scripts or commands that facilitate persistence, privilege escalation, and data access. Recognizing these mappings helps in aligning defensive strategies with industry-standard classification systems for better reporting and remediation prioritization.
To mitigate this risk, immediate action is required to address the root cause within the SHIRASAGI codebase. Developers must implement strict input validation by whitelisting allowed characters rather than relying on blacklists which are prone to bypasses using encoding or obfuscation techniques. Wherever possible, applications should avoid invoking operating system commands directly and instead utilize native API functions provided by the programming language that perform equivalent tasks without involving a shell interpreter. If command execution is unavoidable, arguments must be passed as distinct parameters rather than concatenated into a single string, thereby preventing the injection of additional metacharacters. Additionally, applying the principle of least privilege ensures that even if exploitation occurs, the SHIRASAGI process runs with minimal permissions necessary for its function, significantly reducing the blast radius of any successful attack. Regular security code reviews and automated static application security testing tools should be integrated into the development lifecycle to detect such patterns early before deployment.