{"schemaVersion":3,"id":"CVE-2026-87998","aliases":["GHSA-2724-6cpj-gf3v","PYSEC-2026-4115"],"status":"published","duplicateOf":null,"title":null,"description":"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/open_webui/routers/knowledge.py authorized deletion against the knowledge base but then removed its administrator-owned external connection without a separate administrator check or a check for other dependent knowledge bases. A non-administrator with write access to one external knowledge base could delete shared instance configuration and make every other knowledge base using that connection unavailable. 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