CVE-2026-28786: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an unsanitized filename field in the speech-to-text transcription endpoint...

Added to the CISA Known Exploited Vulnerabilities catalog on 27 Mar 2026. Vendor: AI/ML. Product: artificial intelligence. CVSS score: 4.3.

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an unsanitized filename field in the speech-to-text transcription endpoint allows any authenticated non-admin user to trigger a `FileNotFoundError` whose message — including ...

Required action: Review and patch if applicable to your AI infrastructure.