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OpenAdvisories
High · 7.1 CVE-2026-45349 EUVD-2026-30605GHSA-gfm2-xm6c-37qcPYSEC-2026-2726

Open WebUI: Broken Access Control for Completions API

Published May 15, 2026 · Updated May 19, 2026 · Assigned by GitHub_M

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, a user just needs to use the API endpoint: /api/chat/completions with their own API key (generated in OWUI) and the Chat ID of another user to continue the conversation of the other user. This vulnerability is fixed in 0.9.0.

Affected products

VendorProductAffectedFixed
open-webui open-webui < 0.9.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI open-webui < 0.9.0 0.9.0 GHSA-gfm2-xm6c-37qc

References