Improper neutralization of wildcards or matching symbols in Open WebUI - CVE-2026-87016
Published: September 28, 2026
Vulnerability identifier: #VU152702
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-87016
CWE-ID: CWE-155
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to another user's account.
The vulnerability exists due to improper neutralization of wildcard characters in the OAuth subject and SCIM external-ID lookup functions when resolving externally supplied identity values on SQLite. A remote attacker can supply a subject claim containing SQL wildcard characters to gain unauthorized access to another user's account.
Deliberate OAuth or OIDC exploitation requires the configured subject claim to be user-settable. PostgreSQL deployments are not affected.
Affected software
Open WebUI
How to mitigate CVE-2026-87016
Install security update from vendor's website.
Open WebUI - update to 0.11.1