CVE-2026-87997
Open WebUI: Any authenticated user can inject chats into another user's folder via chat completions
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1.
| CWE | CWE-639 CWE-862 |
| Vendor | open-webui |
| Product | open-webui |
| Published | Sep 9, 2026 |
| Last Updated | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
open-webui / open-webui
>= 0.10.0, < 0.11.1
References
github.com: https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28 github.com: https://github.com/open-webui/open-webui/pull/28366 github.com: https://github.com/open-webui/open-webui/commit/d9e23b90c100d19b00270aea3cde0501d2354a6c github.com: https://github.com/open-webui/open-webui/releases/tag/v0.11.1