Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-70480
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-04 20:16:54 UTC
Updated2026-08-04 20:16:54 UTC
DescriptionOpen 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.

Risk And Classification

Primary CVSS: v3.1 4.1 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

Problem Types: CWE-918 | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
3.1CNADECLARED4.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open-webui Open-webui affected >= 0.6.34, < 0.11.0 Not specified

References

ReferenceSourceLinkTags
github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649 [email protected] github.com
github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d... [email protected] github.com
github.com/open-webui/open-webui/pull/26806 [email protected] github.com
github.com/open-webui/open-webui/releases/tag/v0.11.0 [email protected] github.com
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