Open WebUI: Any authenticated user can hang the server via a cyclic chat message history

Summary Chat histories are stored as an unvalidated JSON object. The walk that reconstructs a chat's message chain detected repeats using each message's own id field while moving through the history by map key, so a message that simply omitted id was never recorded as visited. A history whose...

hubzoid (>=0.7.15, <=0.9.6), openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-88002 via open-webui (>=0.6.0, <=0.11.0)

open-webui PYPI version =0.6.0, =0.7.15, =0.9.6 - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-88002 Source advisory: OSV:GHSA-JQHH-CJMQ-VMV6...

hubzoid (>=0.7.15, <=0.9.6), openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-88002 via open-webui (>=0.6.0, <=0.11.0)

open-webui PYPI version =0.6.0, =0.7.15, =0.9.6 - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-88002 Source advisory: SNYK:PYTHON-OPENWEBUI-20158686...

hubzoid (>=0.7.15, <=0.9.6), openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-88002 via open-webui (>=0.6.0, <=0.11.0)

open-webui PYPI version =0.6.0, =0.7.15, =0.9.6 - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-88002 Source advisory: GHSA-JQHH-CJMQ-VMV6...

EUVD-2026-75188

Open WebUI: Any authenticated user can hang the server via a cyclic chat message history...

GHSA-JQHH-CJMQ-VMV6 Open WebUI: Any authenticated user can hang the server via a cyclic chat message history

Summary Chat histories are stored as an unvalidated JSON object. The walk that reconstructs a chat's message chain detected repeats using each message's own id field while moving through the history by map key, so a message that simply omitted id was never recorded as visited. A history whose...

Infinite loop

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Infinite loop in the message-chain reconstruction process. An attacker can cause the server to hang and consume excessive resources by submitting a chat history with cyclic parent references and omitted id...

CVE-2026-88002

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/openwebui/utils/misc.py advanced through a chat history by map key but tracked visited entries using each message body's optional id...

CVE-2026-87998

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/knowledge/id/delete in backend/openwebui/routers/knowledge.py authorized deletion against the knowledge base but then removed its administrator-owned external connection...

CVE-2026-88001

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, server-side web fetches did not reapply WEBFETCHFILTERLIST or private-address controls to HTTP redirect destinations when AIOHTTPCLIENTALLOWREDIRECTS was enabled. An authenticated user...

CVE-2026-87999

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.1, POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search in backend/openwebui/retrieval/web/utils.py treated Python's globally routable address classification as proof th...

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/messageid used the chat-history deletion helper in backend/openwebui/models/chats.py to follow childrenIds without recording visited message identifiers...

CVE-2026-87997

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/openwebui/main.py copied a client-supplied folderid into a new chat without applying the folder write-access chec...

CVE-2026-87994

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, the channel branch of chatcompletion in backend/openwebui/main.py checked channel write access and channel membership for a supplied messageid but did not verify that the calling user...

CVE-2026-87996

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.1, SafePlaywrightURLLoader in backend/openwebui/retrieval/web/utils.py validated a user-controlled hostname in Python and then let the Playwright browser resolve it again in the sync and...

CVE-2026-87017

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.7.0 until 0.11.1, the built-in knowledge search tool passed the caller's readable knowledge identifiers through a metadata filter, but the search methods in eleven shipped vector backends ignored that...

CVE-2026-87995

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.11 until 0.11.1, src/lib/components/chat/FileNav/PortPreview.svelte rendered terminal port content in an iframe sandbox containing both allow-scripts and allow-same-origin. Because the terminal proxy...

CVE-2026-87016

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.41 until 0.11.1, getuserbyoauthsub and getuserbyscimexternalid in backend/openwebui/models/users.py used JSON contains matching that compiled to SQL LIKE substring matching on SQLite. An OAuth subject...

CVE-2026-88002

Open WebUI (self-hosted AI platform), versions 0.5.0 through 0.11.1 , is affected by a denial-of-service vulnerability in the message-chain reconstruction helper in backend/open_webui/utils/misc.py. The helper advanced through chat history by map key but tracked visited entries using each message...

CVE-2026-88002 Open WebUI: Any authenticated user can hang the server via a cyclic chat message history

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/openwebui/utils/misc.py advanced through a chat history by map key but tracked visited entries using each message body's optional id...