CVE-2026-5125 is an OS command injection vulnerability identified in the raine consult-llm-mcp software up to version 2.5.3. The vulnerability arises from improper handling of input parameters git_diff.base_ref and git_diff.files within the child_process.execSync function call in src/server.ts. This function executes shell commands synchronously, and if user-controlled inputs are not properly sanitized or validated, attackers with local access can inject arbitrary commands to be executed on the host operating system. The vulnerability requires the attacker to have local access and low privileges, but no elevated privileges or user interaction is necessary. The CVSS 4.8 score reflects a medium severity, considering the limited attack vector (local access) and the potential impact on confidentiality, integrity, and availability. The vulnerability was publicly disclosed on March 30, 2026, and a patch was released in version 2.5.4, identified by commit 4abf297b34e5e8a9cb364b35f52c5f0ca1d599d3. Although no active exploitation has been reported, the availability of exploit code increases the risk of future attacks. The flaw could allow attackers to execute arbitrary commands, potentially leading to data compromise, system disruption, or further lateral movement within a network. The affected software is likely used in environments involving AI or machine learning consulting, which may have sensitive data or critical infrastructure dependencies.

The primary impact of CVE-2026-5125 is the potential for local attackers to execute arbitrary operating system commands on affected systems, which can compromise system confidentiality, integrity, and availability. Successful exploitation could allow attackers to read or modify sensitive data, disrupt services, or establish persistence for further attacks. Although the attack requires local access and low privileges, this vulnerability could be leveraged in multi-user environments or combined with other vulnerabilities to escalate privileges or move laterally within a network. Organizations relying on raine consult-llm-mcp for AI or machine learning consulting services may face operational disruptions or data breaches if exploited. The medium CVSS score reflects the moderate risk due to the local access requirement, but the presence of publicly available exploit code increases the urgency for remediation. The vulnerability does not require user interaction, which simplifies exploitation once local access is obtained.

To mitigate CVE-2026-5125, organizations should immediately upgrade raine consult-llm-mcp to version 2.5.4 or later, which contains the patch addressing the command injection flaw. In addition to upgrading, organizations should implement strict access controls to limit local access to trusted users only, reducing the risk of exploitation. Employing application-level input validation and sanitization for any parameters that interact with system commands can further reduce risk. Monitoring and logging local command executions can help detect suspicious activity indicative of exploitation attempts. Network segmentation and the principle of least privilege should be enforced to contain potential breaches. Regularly auditing systems for outdated software versions and applying patches promptly is essential. If upgrading is not immediately possible, consider disabling or restricting the vulnerable functionality or running the application in a constrained environment such as a container with limited OS command execution capabilities.