CVE-2026-88002
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.1, the message-chain reconstruction helper in backend/open_webui/utils/misc.py advanced through a chat history by map key but tracked visited entries using each message body's optional id field. An authenticated user could store id-less messages in a parent cycle and trigger a non-terminating walk that blocked the async event loop, grew memory until termination, and remained persistent across process restarts. This issue is fixed in version 0.11.1.
How to fix
- openwebui open_webui0.11.1 or later
- open-webui0.11.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openwebui open_webui | 0.5.0 ≤ v < 0.11.1 | 0.11.1 |
| open-webuiPyPI | 0.5.0 ≤ v < 0.11.1 | 0.11.1 |
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Attack Surface Management
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