CVE-2026-59222

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.7.0 before 0.10.0, GET /api/v1/channels//members returned full UserModelResponse objects for channel members, including settings.ui.toolServers.key and webhook configuration, allowing a normal channel...

CVE-2026-59222

Open WebUI is a self-hosted AI platform. CVE-2026-59222 affects versions from 0.7.0 up to, but not including, 0.10.0. The vulnerability arises when GET /api/v1/channels/{id}/members returns full UserModelResponse objects for channel members, including settings.ui.toolServers[].key and webhook con...

CVE-2026-59222 Open WebUI: /api/v1/channels/{id}/members exposes full user model including sensitive credentials

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.7.0 before 0.10.0, GET /api/v1/channels//members returned full UserModelResponse objects for channel members, including settings.ui.toolServers.key and webhook configuration, allowing a normal channel...

EUVD-2026-42631

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.7.0 before 0.10.0, GET /api/v1/channels//members returned full UserModelResponse objects for channel members, including settings.ui.toolServers.key and webhook configuration, allowing a normal channel...

CVE-2026-59222

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.7.0 before 0.10.0, GET /api/v1/channels//members returned full UserModelResponse objects for channel members, including settings.ui.toolServers.key and webhook configuration, allowing a normal channel...

CVE-2026-45385 Open WebUI: An IDOR vulnerability exists in the update_message_by_id API endpoint

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, an IDOR vulnerability exists in the Channels feature of Open WebUI, allowing any channel member to modify messages sent by other members including administrators within the same...

CVE-2026-44559 Open WebUI: Missing Access Check on Channel Members Endpoint for Standard Channels

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the GET /api/v1/channels/id/members endpoint only checks membership for group and dm channel types lines 467-469. For standard channels — including private ones — there is no...

CVE-2026-44559 Open WebUI: Missing Access Check on Channel Members Endpoint for Standard Channels

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the GET /api/v1/channels/id/members endpoint only checks membership for group and dm channel types lines 467-469. For standard channels — including private ones — there is no...

CVE-2026-44559 Open WebUI: Missing Access Check on Channel Members Endpoint for Standard Channels

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the GET /api/v1/channels/id/members endpoint only checks membership for group and dm channel types lines 467-469. For standard channels — including private ones — there is no...

Open WebUI 安全漏洞

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under open source. Versions of Open WebUI prior to 0.9.5 contained security vulnerabilities. These vulnerabilities stemmed from insecure direct object reference vulnerabilities in the channel functionality. The...

GHSA-C7WP-3QH5-55PV Open WebUI Missing Access Check on Channel Members Endpoint for Standard Channels

Missing Access Check on Channel Members Endpoint for Standard Channels Affected Component Channel members listing endpoint: - backend/openwebui/routers/channels.py lines 445-507, getchannelmembersbyid Affected Versions Current main branch and likely all versions with the channels feature...

Open WebUI Missing Access Check on Channel Members Endpoint for Standard Channels

Missing Access Check on Channel Members Endpoint for Standard Channels Affected Component Channel members listing endpoint: - backend/openwebui/routers/channels.py lines 445-507, getchannelmembersbyid Affected Versions Current main branch and likely all versions with the channels feature...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization in the getchannelmembersbyid process. An attacker can retrieve the list of users, including their IDs, names, emails, roles, and profile images, associated with a private channel by maki...

PT-2026-39276

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.9.0 Description The 'GET /api/v1/channels/id/members' endpoint fails to perform a channel has access check for standard channels, including private ones. While membership is verified for group and dm channel type...

CVE-2026-2578

Mattermost versions 11.3.x = 11.3.0 fail to preserve the redacted state of burn-on-read posts during deletion which allows channel members to access unrevealed burn-on-read message contents via the WebSocket post deletion event.. Mattermost Advisory ID: MMSA-2026-00579...

Improper Access Control

github.com/mattermost/mattermost-server is vulnerable to improper access control. The vulnerability is due to insufficient validation of guest user permissions when adding channel members, which allows an attacker to add any team member to their private channels via the...

CVE-2025-55074 Channel member objects leak read status

Mattermost versions 10.11.x = 10.11.3, 10.5.x = 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects...

Unspecified Vulnerability in Mattermost (CNVD-2025-24795)

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. Mattermost suffers from a security vulnerability that can be exploited by an attacker to cause guest users to add arbitrary team members to their private channels via the...

CVE-2025-10545

Mattermost versions 10.5.x = 10.5.10, 10.11.x = 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the /api/v4/channels/channelid/members endpoint...

CVE-2025-10545 Guest user can add unauthorized team users to private channels

Mattermost versions 10.5.x = 10.5.10, 10.11.x = 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the /api/v4/channels/channelid/members endpoint...