Incorrect Authorization Affecting open-webui package, versions [0.3.6,0.9.5)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-OPENWEBUI-16735131
- published18 May 2026
- disclosed14 May 2026
- creditKadirArslan
Introduced: 14 May 2026
NewCVE-2026-45395 (opens in a new tab)How to fix?
Upgrade open-webui to version 0.9.5 or higher.
Overview
open-webui is an Open WebUI
Affected versions of this package are vulnerable to Incorrect Authorization through the update_tools_by_id handler in routers/tools.py. An attacker can execute arbitrary Python code on the server by sending a tool update that modifies the tool's content after obtaining a write grant on the tool, even without the workspace permissions normally required to submit executable tool code. The vulnerable path accepts content overwrites for existing tools and passes the updated source into load_tool_module_by_id, where it is imported with exec(content, module.__dict__). In deployments where the worker runs with elevated privileges, this lets a collaborator with only per-tool write access run attacker-controlled code as the server user and potentially exfiltrate data or take over the container.