CVE-2026-70480
Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.34 until 0.11.0, Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer browser without a restricted resource loader. Any user who can place such a block where another user will see it can make that user browser issue attacker-chosen outbound GET requests and read responses from same-origin or CORS-permissive targets into the rendered page. This issue is fixed in 0.11.0.
INFO
Published Date :
Aug. 4, 2026, 8:16 p.m.
Last Modified :
Sept. 18, 2026, 2:45 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-70480
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update Open WebUI to version 0.11.0.
- Apply updates to all instances of Open WebUI.
- Verify the update for security.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-70480.
| URL | Resource |
|---|---|
| https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6 | Patch |
| https://github.com/open-webui/open-webui/pull/26806 | Patch Vendor Advisory |
| https://github.com/open-webui/open-webui/releases/tag/v0.11.0 | Release Notes |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649 | Exploit Patch Vendor Advisory |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649 | Exploit Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-70480 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-70480
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-70480 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-70480 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 18, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:* versions from (including) 0.6.34 up to (excluding) 0.11.0 Added Reference Type GitHub, Inc.: https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/open-webui/open-webui/pull/26806 Types: Patch, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/open-webui/open-webui/releases/tag/v0.11.0 Types: Release Notes Added Reference Type CISA-ADP: https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649 Types: Exploit, Patch, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649 Types: Exploit, Patch, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 05, 2026
Action Type Old Value New Value Added Reference https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649 Added SSVC {'id': 'CVE-2026-70480', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-05T14:18:17.750527Z'} -
New CVE Received by [email protected]
Aug. 04, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'open-webui', 'product': 'open-webui', 'versions': [{'status': 'affected', 'version': '>= 0.6.34, < 0.11.0'}]}] Added Description Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.34 until 0.11.0, Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer browser without a restricted resource loader. Any user who can place such a block where another user will see it can make that user browser issue attacker-chosen outbound GET requests and read responses from same-origin or CORS-permissive targets into the rendered page. This issue is fixed in 0.11.0. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N Added CWE CWE-918 Added Reference https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6 Added Reference https://github.com/open-webui/open-webui/pull/26806 Added Reference https://github.com/open-webui/open-webui/releases/tag/v0.11.0 Added Reference https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649