Open WebUI: Users denied the image-generation permission can still generate images via chat completions

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-70484
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-04 20:16:55 UTC
Updated2026-08-05 16:17:02 UTC
DescriptionOpen WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.7.0 until 0.11.0, the legacy chat-completions features block trusted a client-supplied image_generation flag and did not re-check the features.image_generation permission that the direct image routes and native function-calling path enforce. An authenticated user whose image-generation permission had been revoked could still consume the operator's configured image provider through chat completions, spending API credits and provider quota and writing generated files to operator storage, without exposing provider credentials or other users' data. This issue is fixed in 0.11.0.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

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

EPSS: 0.002670000 probability, percentile 0.186630000 (date 2026-08-07)

Problem Types: CWE-862 | CWE-863 | CWE-862 CWE-862: Missing Authorization | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open-webui Open-webui affected >= 0.7.0, < 0.11.0 Not specified

References

ReferenceSourceLinkTags
github.com/open-webui/open-webui/pull/26703 [email protected] github.com
github.com/open-webui/open-webui/commit/897d69a35c65f8ab54583bb9ca8dc74e... [email protected] github.com
github.com/open-webui/open-webui/security/advisories/GHSA-g423-grf7-98rv [email protected] github.com
github.com/open-webui/open-webui/releases/tag/v0.11.0 [email protected] github.com
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