medium4.3
CVE-2026-87997
Open WebUI: Any authenticated user can inject chats into another user's folder via chat completions
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | open-webui | >= 0.10.0, < 0.11.1 | 0.11.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openwebui | Open Webui | from 0.10.0 before 0.11.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-3pf7-q2g3-wj28
- https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28
- https://nvd.nist.gov/vuln/detail/CVE-2026-87997
- https://github.com/open-webui/open-webui/pull/28366
- https://github.com/open-webui/open-webui/commit/d9e23b90c100d19b00270aea3cde0501d2354a6c
- https://github.com/open-webui/open-webui/releases/tag/v0.11.1