CVE-2026-87016

Open WebUI: Sign-in as another user via wildcard characters in the OAuth subject claim on SQLite

State: Published
Severity: 8.1 High
Published: Sep 9, 2026
Updated: Sep 14, 2026
Reserved: Sep 8, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-155 Improper Neutralization of Wildcards or Matching Symbols
CWE-287 Improper Authentication

Affected Products

Product	Versions
open-webuiopen-webui	>= 0.6.41, < 0.11.1Affected

References

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