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Vulnerability record · CVE-2026-87016 · published 9 September 2026

CVE-2026-87016: Openwebui open webui improper authentication vulnerability

Openwebui · Open Webui

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.

8.1 CVSS 3.1 High EPSS 0.60% · top 53.5% CWE-155 · CWE-155CWE-287 · Improper authentication
8.1CVSS 3.1 base score
0.60%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 2 tagged exploit
15 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/open-webui/open-webui/commit/73c1f5806aeb6345dad5de8f5aa26d1f3d0bef80 Patch
https://github.com/open-webui/open-webui/pull/28624 Issue TrackingPatch
https://github.com/open-webui/open-webui/releases/tag/v0.11.1 Release Notes
https://github.com/open-webui/open-webui/security/advisories/GHSA-wpmr-8h3q-fwj7 ExploitVendor Advisory
https://github.com/open-webui/open-webui/security/advisories/GHSA-wpmr-8h3q-fwj7 ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-87016), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.