CVE-2026-87016

High

Description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.41 until 0.11.1, get_user_by_oauth_sub and get_user_by_scim_external_id in backend/open_webui/models/users.py used JSON contains matching that compiled to SQL LIKE substring matching on SQLite. An OAuth subject containing percent or underscore wildcard characters could resolve to a different stored identity, potentially selecting an administrator account and issuing the attacker that account's session; PostgreSQL deployments were not affected. This issue is fixed in version 0.11.1.

SeverityHigh
CVSS8.1
Exploit probability—
ProductOpenwebui Open Webui
PublishedSep 9, 2026
First seenSep 9, 2026

How to fix

Update
  • openwebui open_webui0.11.1 or later
  • open-webui0.11.1 or later

Affected products

ProductAffected versionsFixed in
openwebui open_webui0.6.41 ≤ v < 0.11.10.11.1
open-webuiPyPI0.6.41 ≤ v < 0.11.10.11.1

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