CVE-2026-70484Network attack vectorHinoki check available

Unauthorized image generation via trusted client flag

Published Aug 4, 2026 · Updated Aug 4, 2026

Incorrect authorization in Open WebUI allows remote authenticated users to generate images through legacy chat completions. The process_chat_payload path treats the client-supplied image_generation feature flag as authorization and dispatches the image handler without re-checking the caller's permission. Affected deployments run 0.7.0 or later but before 0.11.0, enable image generation with a provider, and revoke it for the caller; successful requests consume provider credits and storage without exposing credentials or other users' data.

CVSS severity4.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Incorrect authorization in Open WebUI allows remote authenticated users to generate images through legacy chat completions. The process_chat_payload path treats the client-supplied image_generation feature flag as authorization and dispatches the image handler without re-checking the caller's permission. Affected deployments run 0.7.0 or later but before 0.11.0, enable image generation with a provider, and revoke it for the caller; successful requests consume provider credits and storage without exposing credentials or other users' data.

The record

CVE
CVE-2026-70484
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-863, CWE-862, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.7.0, < 0.11.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open WebUI · Open WebUIversion=>= 0.7.0, < 0.11.0

Published CVSS scores

4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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