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.
Metrics
Affected Vendors & Products
References
History
Mon, 14 Sep 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Openwebui
Openwebui open Webui |
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| CPEs | cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Openwebui
Openwebui open Webui |
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| Metrics |
ssvc
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Thu, 10 Sep 2026 11:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Open-webui
Open-webui open-webui |
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| Vendors & Products |
Open-webui
Open-webui open-webui |
Wed, 09 Sep 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | Open WebUI: Any authenticated user can hang the server via a cyclic chat message history | |
| Weaknesses | CWE-835 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-09T21:40:06.412Z
Updated: 2026-09-14T18:41:05.853Z
Reserved: 2026-09-09T19:19:27.406Z
Link: CVE-2026-88002
Updated: 2026-09-14T18:41:01.651Z
Status : Analyzed
Published: 2026-09-09T22:18:49.080
Modified: 2026-09-14T19:56:27.077
Link: CVE-2026-88002
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