Detections
Analytics
Open WebUI < 0.9.5 Multiple Vulnerabilities
high Nessus Plugin ID 314912
Synopsis
An AI platform running on the remote host is affected by multiple vulnerabilities.Description
The version of Open WebUI running on the remote host is prior to 0.9.5. It is, therefore, affected by multiple vulnerabilities:- An insecure direct object reference (IDOR) vulnerability in the retrieval API allows any authenticated user who knows a private knowledge base UUID to bypass access controls and read, inject content into, or destroy another user's knowledge base. The _validate_collection_access() function only checks user-memory-* and file-* collection name prefixes but does not validate knowledge base collections which use raw UUIDs. (CVE-2026-45398)
- A server-side request forgery (SSRF) vulnerability exists because the validate_url() function only validates the initial URL submitted by the caller. HTTP clients used downstream follow 3xx redirects by default without re-validating the redirect target against the private-IP block list. Any authenticated user can submit a public URL that redirects to an internal address and read the response. (CVE-2026-45401)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Open WebUI version 0.9.5 or later.See Also
Plugin Details
Severity: High
ID: 314912
File Name: open_webui_0_9_5.nasl
Version: 1.1
Type: Remote
Family: Artificial Intelligence
Published: 5/15/2026
Updated: 5/15/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 8.4
CVSS v2
Risk Factor: High
Base Score: 8.5
Vector: CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C
CVSS Score Source: CVE-2026-45398
CVSS v3
Risk Factor: High
Base Score: 8.5
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
CVSS Score Source: CVE-2026-45401
CVSS v4
Risk Factor: High
Base Score: 8.4
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
Vulnerability Information
CPE: cpe:/a:openwebui:open_webui
Required KB Items: installed_sw/Open WebUI
Patch Publication Date: 5/10/2026
Vulnerability Publication Date: 5/10/2026
Reference Information
CVE: CVE-2026-45398, CVE-2026-45401