Vulnerabilities
Vulnerable Software

Vulnerability Details 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/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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 23.1%
CVSS Severity
CVSS v3 Score 6.5
Products affected by CVE-2026-88002


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