CVE-2026-44561
MEDIUM EPSS 7.6%
Published May 15, 20261mo ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Published May 15, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the is_user_channel_member function checks whether a ChannelMember row exists but does not check the is_active field. When a user is deactivated from a group or DM channel (removed by the channel owner, or leaves voluntarily), their membership row persists with is_active=False and status='left'. Because the authorization check ignores this field, the deactivated user retains full read and write access to the channel via direct API calls. This vulnerability is fixed in 0.9.0.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None
Threat Intelligence
EPSS Exploit Probability
7.6% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available
Weaknesses 1
CWE-863 Incorrect Authorization Authorization
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| openwebui | open_webui | * | <0.9.0 |
References 1
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-hmgr-67hw-j2cq
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.