CVE-2026-56291: Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerability

Balbooa Forms contains an unrestricted upload of file with dangerous type vulnerability. An unauthenticated attacker can upload executable files, which may lead to remote code execution on the affected system.

How it works

The weakness is categorized as CWE-434. The software fails to enforce restrictions on the type or content of uploaded files. An attacker supplies a file with a dangerous extension or payload through the form upload mechanism. Because authentication is not required, the file is stored and can later be executed by the web server or application runtime, resulting in full remote code execution.

Am I affected? How to find it in your systems

Inventory all installations of Balbooa Forms across web servers and content-management deployments. Examine configuration files and plugin directories to identify the product version and any custom upload-handling settings. Confirm the precise affected versions and configurations against the vendor advisory, as public detail on exact release ranges is limited. Review web-server access logs for unexpected POST requests to form endpoints and monitor for subsequent execution of uploaded files with executable extensions.

How to remediate

Apply the vendor update referenced in the official advisory. Follow all instructions provided by the vendor to ensure the upload restriction is enforced. Align the deployment with CISA BOD 26-04 guidance on prioritizing security updates based on risk and with CISA forensics triage requirements. For cloud-hosted instances, evaluate internet exposure and apply the same patching sequence or discontinue use if mitigations cannot be implemented.

If you can't patch immediately

Restrict network access to the affected forms so that only trusted sources can reach the upload endpoints. Apply web-application firewall rules that block requests containing executable file extensions or suspicious content types. Disable the file-upload feature entirely until the update can be applied. Increase monitoring of web logs and file-system changes for indicators of unauthorized uploads while the compensating controls remain in place.

If your data may have been exposed

Vulnerabilities that permit arbitrary file upload and remote code execution have been used to establish persistent access and exfiltrate data. Run a free exposure scan of organizational email addresses against known breach datasets to determine whether related credentials or data have already appeared in public records.