Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, validate_url() in backend/open_webui/retrieval/web/utils.py calls validators.ipv6(ip, private=True), but the validators library does NOT implement the private keyword for IPv6 — the call raises a ValidationError (which is falsy in a boolean context), so every IPv6 address passes the filter. In addition, IPv4-mapped IPv6 (::ffff:10.0.0.1) bypasses the IPv4 check entirely, and several reserved IPv4 ranges (0.0.0.0/8, 100.64.0.0/10, 192.0.0.0/24, etc.) are not blocked. This vulnerability is fixed in 0.9.0.
References
| Link | Resource |
|---|---|
| https://github.com/open-webui/open-webui/security/advisories/GHSA-4v7r-f4w8-8972 | Exploit Mitigation Vendor Advisory |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-4v7r-f4w8-8972 | Exploit Mitigation Vendor Advisory |
Configurations
History
19 May 2026, 03:06
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Openwebui
Openwebui open Webui |
|
| References | () https://github.com/open-webui/open-webui/security/advisories/GHSA-4v7r-f4w8-8972 - Exploit, Mitigation, Vendor Advisory | |
| CPE | cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:* |
15 May 2026, 23:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/open-webui/open-webui/security/advisories/GHSA-4v7r-f4w8-8972 - |
15 May 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-15 20:16
Updated : 2026-05-19 03:06
NVD link : CVE-2026-45331
Mitre link : CVE-2026-45331
CVE.ORG link : CVE-2026-45331
JSON object : View
Products Affected
openwebui
- open_webui
CWE
CWE-918
Server-Side Request Forgery (SSRF)