Missing Authorization Affecting open-webui package, versions [0.10.0,0.11.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published27 Sept 2026
- disclosed10 Sept 2026
- creditUnknown
Introduced: 10 Sep 2026
NewCVE-2026-87997 (opens in a new tab)How to fix?
Upgrade open-webui to version 0.11.1 or higher.
Overview
open-webui is an Open WebUI
Affected versions of this package are vulnerable to Missing Authorization through the chat-completions process. An attacker can insert unauthorized chat entries into another user's folder by supplying a folder ID they do not have write access to. This allows the attacker to create chats that appear in folders belonging to other users, including shared folders where they only have read access, and control the chat's title and content as displayed to legitimate users. This is only exploitable if the attacker knows the target folder's ID and folders are enabled in the deployment.