CVE-2026-54007 Details
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the chat message listener allows non-same-origin input:prompt and action:submit messages, so an external site can set prompt text and trigger submitPrompt() in an authenticated victim session. I validated this with a cross-origin attacker page that auto-posted messages and caused unauthorized POST /api/v1/chats/new and POST /api/chat/completions requests containing attacker-controlled prompts. This enables cross-site forced actions and model/tool execution under victim privileges without consent. This vulnerability is fixed in 0.9.6.
A vulnerability in Open WebUI versions prior to 0.9.6 allows cross-origin injection of chat messages in authenticated user sessions. The chat message listener does not properly enforce same-origin policies, enabling external sites to send prompt text and trigger message submissions without user consent. This exploitation results in unauthorized API requests being made under the victim's credentials, facilitating cross-site forced actions and execution of model or tool functions as the affected user.
Users can update to Open WebUI version 0.9.6 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 26, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55 | CISA-ADP | ExploitVendor Advisory |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-346 | Origin Validation Error | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openwebui open webui | < 0.9.6 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 26, 2026 | CVE Modified | CISA-ADP |
| Jun 25, 2026 | Initial Analysis | [email protected] |
| Jun 23, 2026 | New CVE Received | [email protected] |