CVE-2026-70481

CVE-2026-70481 affects Open WebUI prior to 0.11.0. In standard channels, the update and delete message handlers allowed any user with write access to a channel to rewrite or permanently delete other users’ messages, because the standard branch checked only write permission, not message authorship...

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...