CVE-2026-87016CWE-155CWE-287

CVE-2026-87016

High · published September 10, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
48.0
In the wild
Unconfirmed
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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00599 · 48.0th percentile
Weaknesses
CWE-155 · Improper Neutralization of Wildcards or Matching Symbols; CWE-287 · Improper Authentication
Published
2026-09-10T02:18Z
Affected products (1)
ProductVersionsFixed in
openwebui/open_webui≥ 0.6.41, < 0.11.10.11.1
References (5)
https://github.com/open-webui/open-webui/commit/73c1f5806aeb6345dad5de8f5aa26d1f3d0bef80 · [email protected]https://github.com/open-webui/open-webui/pull/28624 · [email protected]https://github.com/open-webui/open-webui/releases/tag/v0.11.1 · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-wpmr-8h3q-fwj7 · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-wpmr-8h3q-fwj7 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 11 SEP 03:19Z
    EPSS moved — → 0%
    epss
  • 09 SEP 21:21Z
    Open WebUI: Sign-in as another user via wildcard characters in the OAuth subject claim on SQLite
    cvelistv5