ZDI-CAN-28257: ZDI-26-032: (0Day) Open WebUI load_tool_module_by_id Command Injection Remote Code Execution Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Open WebUI. Authentication is required to exploit this vulnerability. The specific flaw exists within the loadtoolmodulebyid function. The issue results from the lack of proper validation of a user-supplied string before using it to execute Python code. An attacker can leverage this vulnerability to execute code in the context of the service account.
Other sources
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Open WebUI. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-0766.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-28257?
ZDI-CAN-28257 is considered a critical remote code execution vulnerability.
How do I fix ZDI-CAN-28257?
To fix ZDI-CAN-28257, update the Open WebUI to the latest patched version provided by the vendor.
Who is affected by ZDI-CAN-28257?
ZDI-CAN-28257 affects installations of Open WebUI that have not been updated to address this vulnerability.
Is authentication required to exploit ZDI-CAN-28257?
Yes, authentication is required to exploit the ZDI-CAN-28257 vulnerability.
What type of vulnerability is ZDI-CAN-28257?
ZDI-CAN-28257 is a command injection vulnerability leading to remote code execution.