CVE-2026-45303
HIGH
MEDIUM
Priority: 0.02
BB Relevance:
45/100
Published: 2026-05-15
Modified: 2026-11-11
First seen: 2026-11-11
Status: active
Attack Surface
Network
Conf. Impact
Integ. Impact
Scope Change
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
Low
UI:
Required
S:
Changed
C:
High
I:
High
A:
None
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.5, through the HTML rendering view, scripts can be injected and executed. The frontend provides a function to visualize the HTML content of a current chat. The content is embedded in an iFrame with the allow-scripts allow-forms allow-same-origin sandbox directive. This means that the content is placed in a sandbox but with permission to execute scripts and access the parent’s data (e.g., local storage). As a result, only a few functions are restricted (e.g., displaying an alert box), but in effect, the sandbox attribute is largely nullified. This vulnerability is fixed in 0.6.5.
Weakness Classification (1)
Affected Software (1)
| Vendor | Product | Version |
|---|---|---|
| openwebui | open_webui | < 0.6.5 |
References & Advisories (1)
Exploit
Mitigation
Vendor Advisory