CVE-2026-88000

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, DELETE /api/v1/chats/{id}/messages/{message_id} used the chat-history deletion helper in backend/open_webui/models/chats.py to follow childrenIds without recording visited message identifiers. An authenticated user could store a cyclic chat tree and delete a message, causing a synchronous infinite loop on the server request loop that blocked every user's requests until the process was killed. This issue is fixed in version 0.11.1.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/open-webui/open-webui/commit/b933292d63d12be3fd1416fe55519ddc7aa336bc	Patch
https://github.com/open-webui/open-webui/pull/28035	Exploit Patch
https://github.com/open-webui/open-webui/releases/tag/v0.11.1	Release Notes
https://github.com/open-webui/open-webui/security/advisories/GHSA-3cgp-3cqx-j8w2	Exploit Vendor Advisory
https://github.com/open-webui/open-webui/security/advisories/GHSA-3cgp-3cqx-j8w2	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-09-09 22:18

Updated : 2026-09-14 17:48

NVD link : CVE-2026-88000

Mitre link : CVE-2026-88000

CVE.ORG link : CVE-2026-88000

JSON object : View

Products Affected

openwebui

open_webui

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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