OAuth Token Management Flaw in Open WebUI by Open WebUI
CVE-2026-88006

6.5MEDIUM

Key Information:

Vendor

Open-webui

Status
Open-webui
Vendor
CVE Published:
10 September 2026

What is CVE-2026-88006?

An improperly managed OAuth token exchange endpoint in Open WebUI allows users to obtain sessions through a flawed process. Specifically, from versions 0.8.0 to 0.11.1, this vulnerability permits users to gain access to services without proper role validation, undermining the principle of least privilege. Affected users might exploit this vulnerability to operate with elevated privileges without appropriate authorization checks. It is advisable to upgrade to version 0.11.1 or later to mitigate the risk associated with this flaw.

Affected Version(s)

open-webui >= 0.8.0, < 0.11.1

References

https://github.com/open-webui/open-webui/security/advisor...
x_refsource_CONFIRM
https://github.com/open-webui/open-webui/commit/d799e81ed...
x_refsource_MISC
https://github.com/open-webui/open-webui/releases/tag/v0....
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.