CVE-2026-87016

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.6% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-09 22:18 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-15 15:29 UTC Last updatedMost recent change to the record

Details

Published

2026-09-09 22:18 UTC

Last modified

2026-09-15 15:29 UTC

Exploit probability

0.6% · EPSS, next 30 days

Weakness

CWE-155

Record status

Analyzed

Affected

• Openwebui Open Webui < 0.11.1

Attack profile CVSS 3.1 · 8.1

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High