CVE-2026-27483: High Vulnerability in MindsDB

MindsDB is a platform for building artificial intelligence from enterprise data. Prior to version 25.9.1.1, there is a path traversal vulnerability in MindsDB's /api/files interface, which an authenticated attacker can exploit to achieve remote command execution. The vulnerability exists in the "Upload File" module, which corresponds to the API endpoint /api/files. Since the multipart file upload does not perform security checks on the uploaded file path, an attacker can perform path traversal by using `../` sequences in the filename field.

The file write operation occurs before calling clear_filename and save_file, meaning there is no filtering of filenames or file types, allowing arbitrary content to be written to any path on the server. Version 25.9.1.1 patches the issue.

The CVSS score for this vulnerability is 8.8, categorizing it as high severity. This indicates that the vulnerability can be exploited easily and could lead to significant impacts such as unauthorized access to sensitive data or complete system compromise.

Risk to organizations includes potential unauthorized command execution, which can lead to data breaches or infrastructure compromise. Organizations should prioritize patching immediately.

Currently, there is a known exploit available for this vulnerability, and organizations are advised to take immediate action to mitigate the risk.

This vulnerability highlights the importance of robust input validation and security checks in file upload functionalities.

Vulnerability Details

CVE-2026-27483 is classified under CWE-22, which pertains to improper limitation of a pathname to a restricted directory. The vulnerability affects MindsDB versions prior to 25.9.1.1. The published date of this vulnerability is February 24, 2026.

Technical Analysis

The root cause of this vulnerability is the lack of security checks on the uploaded file path in the file upload process. Attackers can exploit this by manipulating the filename to include path traversal sequences.

The attack vector is network-based, requiring low attack complexity and low privileges, with no user interaction needed. This makes the vulnerability particularly dangerous, as it can be exploited remotely without requiring access to the internal network.

The impacts include high confidentiality, integrity, and availability risks, as attackers can execute arbitrary commands on the server.

Risk & Impact Analysis

The real-world deployment risk associated with CVE-2026-27483 is significant. Given that the attack can be conducted remotely with minimal prerequisites, organizations face a substantial risk of exploitation if they have not applied the patch.

Organizations should assess their exposure and prioritize patching of MindsDB installations to mitigate this vulnerability. The blast radius could potentially include any data and services managed by the affected MindsDB instance, leading to severe operational impacts.

In light of the high CVSS score, organizations should address this vulnerability in their priority patch cycle.

Exploitation Status

Affected Versions

The vulnerability affects MindsDB versions prior to 25.9.1.1. Organizations should ensure they are running the patched version to mitigate this risk.

Mitigation & Remediation

Organizations should update to MindsDB version 25.9.1.1 or later to address this vulnerability. If an immediate upgrade is not possible, consider implementing file upload restrictions and additional input validation measures to mitigate the risk.

For ongoing security, organizations may benefit from engaging in penetration testing to identify similar weaknesses.

Detection Guidance

Monitoring for unusual file upload patterns and reviewing logs for unauthorized access attempts are critical for detecting potential exploitation of this vulnerability.

AppSecure Threat Intelligence Insight

This vulnerability illustrates a common pitfall in file upload mechanisms. Organizations should review their file handling processes to prevent path traversal vulnerabilities.

It is essential for security teams to stay updated on security advisories and regularly assess their systems for vulnerabilities. For additional insights, organizations can refer to our penetration testing methodology and best practices to bolster their defenses.

Engaging in continuous security efforts will help organizations mitigate the risk of such vulnerabilities in the future.

For deeper insights into application security, organizations can explore our vulnerability management program design resources and consider a comprehensive security testing strategy to enhance their security posture.