CVE-2026-87016
Open WebUI: Sign-in as another user via wildcard characters in the OAuth subject claim on SQLite
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-155 CWE-287 |
| Vendor | open-webui |
| Product | open-webui |
| Published | Sep 9, 2026 |
| Last Updated | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
open-webui / open-webui
>= 0.6.41, < 0.11.1
References
github.com: https://github.com/open-webui/open-webui/security/advisories/GHSA-wpmr-8h3q-fwj7 github.com: https://github.com/open-webui/open-webui/pull/28624 github.com: https://github.com/open-webui/open-webui/commit/73c1f5806aeb6345dad5de8f5aa26d1f3d0bef80 github.com: https://github.com/open-webui/open-webui/releases/tag/v0.11.1