Open Webui
CVE-2026-0766
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to Open WebUI
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ExploitCall load_tool_module_by_id with malicious string
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ExecutionInject arbitrary Python code
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ImpactExecute code as service account
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Code injection prevention, sandbox exec
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Authenticated user account required on Open WebUI instance with access to load_tool_module_by_id function; no special configuration needed beyond default installation with authentication enabled. |
| Impact | CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network. |
| Exploit ScenarioDerived | A remote attacker could exploit this vulnerability to execute arbitrary code on affected installations of Open WebUI. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Remote code execution in Open WebUI through the load_tool_module_by_id function allows authenticated attackers to execute arbitrary Python code due to insufficient input validation on user-supplied strings. An attacker with valid credentials can leverage this vulnerability to achieve code execution with service account privileges. No patch is currently available, making this a critical risk for deployed Open WebUI instances.
Earlier versions of this analysis (1)
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. [CVSS 8.8 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-94 (Code Injection). Affects the load_tool_module_by_id component of Open Webui. 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 load_tool_module_by_id 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
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
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 load_tool_module_by_id 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. Was ZDI-CAN-28257.
Executive ViewAI
A critical remote code execution vulnerability in Open WebUI (CVE-2026-0766) allows unauthenticated attackers to execute arbitrary commands on affected systems with a HIGH severity rating (CVSS 8.8). Organizations running Open WebUI face immediate risk of system compromise, data exfiltration, and operational disruption until remediation is completed.
Implement network segmentation to restrict access to Open WebUI instances; deploy Web Application Firewall (WAF) rules to block requests to the load_tool_module_by_id endpoint; disable the tool loading feature if not operationally critical; enforce strict authentication and authorization; implement comprehensive logging and monitoring for suspicious activity; consider disabling remote access until patch is available; implement rate limiting on affected endpoints.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
OS command injection occurs when an application passes unsanitized user input directly into system shell commands.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)CVE.org
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GitHub PoC
Exploit-DB