Open WebUI: Sign-in as another user via wildcard characters in the OAuth subject claim on SQLite
Summary
| CVE | CVE-2026-87016 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-09 22:18:46 UTC |
| Updated | 2026-09-10 14:50:07 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.1 HIGH from [email protected]
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.003340000 probability, percentile 0.263190000 (date 2026-09-10)
Problem Types: CWE-155 | CWE-287 | CWE-155 CWE-155: Improper Neutralization of Wildcards or Matching Symbols | CWE-287 CWE-287: Improper Authentication
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.1 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 8.1 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Open-webui | Open-webui | affected >= 0.6.41, < 0.11.1 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/open-webui/open-webui/commit/73c1f5806aeb6345dad5de8f5aa26d1f... | [email protected] | github.com | |
| github.com/open-webui/open-webui/security/advisories/GHSA-wpmr-8h3q-fwj7 | [email protected] | github.com | |
| github.com/open-webui/open-webui/pull/28624 | [email protected] | github.com | |
| github.com/open-webui/open-webui/releases/tag/v0.11.1 | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.