Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.1, POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search in backend/open_webui/retrieval/web/utils.py treated Python's globally routable address classification as proof that a destination was external. An authenticated user could make an Azure-hosted instance fetch and return content from 168.63.129.16, the Azure platform channel, as well as other reserved ranges that the standard classification did not reject. This issue is fixed in version 0.11.1.
Published: 2026-09-09
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: Server‑Side Request Forgery to Azure platform channel
Action: Immediate Patch
AI Analysis

Impact

An authenticated user of Open WebUI can cause the server to perform a web request to the Azure internal IP 168.63.129.16 via the POST /api/v1/retrieval/process/web and /api/v1/retrieval/process/web/search endpoints. This Server‑Side Request Forgery (CWE‑918) allows the attacker to retrieve data from a protected Azure platform channel that is normally unreachable from the public internet, potentially exposing internal information or services that should be hidden.

Affected Systems

This flaw affects installations of Open WebUI prior to version 0.11.1. The fix was included in the 0.11.1 release. All instances running older versions are vulnerable.

Risk and Exploitability

With a CVSS score of 7.1 the vulnerability is considered medium‑to‑high severity. The EPSS score is not available, and the issue is not listed in the CISA KEV catalog. Exploitation requires authentication to the application; an attacker can trigger outbound requests to Azure internal addresses by submitting a crafted request. Because the attacker cannot execute arbitrary code, the impact is limited to potential data exposure and network reconnaissance. However, the ability to reach Azure internal services may aid in further attacks if additional credentials or lateral movement capabilities are obtained.

Generated by OpenCVE AI on September 9, 2026 at 22:20 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update Open WebUI to version 0.11.1 or later to apply the official fix.
  • If an immediate upgrade is not possible, block outbound traffic to Azure internal IP ranges such as 168.63.129.16 in the host firewall or network configuration.
  • Restrict the use of the web retrieval endpoints by removing them from the application or limiting access to only trusted users, and apply the principle of least privilege to authenticated accounts.

Generated by OpenCVE AI on September 9, 2026 at 22:20 UTC.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-34r3-9m95-vq73 Open WebUI: Any authenticated user can reach the Azure platform channel via server-side web fetch
History

Wed, 16 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Openwebui
Openwebui open Webui
CPEs cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*
Vendors & Products Openwebui
Openwebui open Webui

Thu, 10 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 10 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Open-webui
Open-webui open-webui
Vendors & Products Open-webui
Open-webui open-webui

Wed, 09 Sep 2026 21:45:00 +0000

Type Values Removed Values Added
Description Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.1, POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search in backend/open_webui/retrieval/web/utils.py treated Python's globally routable address classification as proof that a destination was external. An authenticated user could make an Azure-hosted instance fetch and return content from 168.63.129.16, the Azure platform channel, as well as other reserved ranges that the standard classification did not reject. This issue is fixed in version 0.11.1.
Title Open WebUI: Any authenticated user can reach the Azure platform channel via server-side web fetch
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N'}

Subscriptions

Open-webui Open-webui
Openwebui Open Webui
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-10T15:35:54.372Z

Reserved: 2026-09-09T19:19:27.405Z

Link: CVE-2026-87999

cve-icon Vulnrichment

Updated: 2026-09-10T15:35:31.523Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-09T22:18:48.617

Modified: 2026-09-16T15:13:49.077

Link: CVE-2026-87999

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T12:00:10Z

Weaknesses
  • CWE-918

    Server-Side Request Forgery (SSRF)