CVE-2026-44561

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the isuserchannelmember function checks whether a ChannelMember row exists but does not check the isactive field. When a user is deactivated from a group or DM channel removed by the...

Incorrect Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Incorrect Authorization in the isuserchannelmember function. An attacker can retain unauthorized read and write access to group or direct message channels by making direct API calls after being deactivated fr...

CVE-2026-41891

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0 to before version 0.31.8.0, the auth filter has the deactivated/banned user check commented out. This issue has been patched in version...

CVE-2026-41891

CI4MS (CodeIgniter 4-based CMS skeleton) has a deactivated/banned user bypass in versions 0.26.0–0.31.7.x due to the auth filter’s deactivated user check being commented out. The issue arises when an admin deactivates a user (active=0) after login: the user’s session remains valid and auth()->...

CVE-2026-41891 CI4MS: Deactivated User Session Bypass (active=0)

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0 to before version 0.31.8.0, the auth filter has the deactivated/banned user check commented out. This issue has been patched in version...

GHSA-5HFV-C864-QCQ9 CI4MS has a Deactivated User Session Bypass (active=0)

Summary The auth filter has the deactivated/banned user check commented out. Details CodeIgniter Shield's loggedIn re-checks the status field catching status='banned', but does not re-check the active field for existing sessions. When an admin deactivates a user active=0 after they have already...

CI4MS has a Deactivated User Session Bypass (active=0)

Summary The auth filter has the deactivated/banned user check commented out. Details CodeIgniter Shield's loggedIn re-checks the status field catching status='banned', but does not re-check the active field for existing sessions. When an admin deactivates a user active=0 after they have already...

SUSE CVE-2026-20796

Mattermost versions 10.11.x = 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /commonteams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549...

Time-of-check Time-of-use (TOCTOU) Race Condition

Overview Affected versions of this package are vulnerable to Time-of-check Time-of-use TOCTOU Race Condition via a race condition in the /commonteams API endpoint. An attacker can gain unauthorized access to team names by exploiting the timing of channel membership validation during data retrieva...

Mattermost doesn't properly validate channel membership at the time of data retrieval

Mattermost versions 10.11.x = 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /commonteams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549...

CVE-2026-20796

Mattermost versions 10.11.x = 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /commonteams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549...

CVE-2026-20796 Time-of-check time-of-use vulnerability in common teams API

Mattermost versions 10.11.x = 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /commonteams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549...

CVE-2026-20796

Mattermost CVE-2026-20796 affects version 10.11.x up to 10.11.9, due to improper validation of channel membership at data retrieval. A race condition in the /common_teams API endpoint can allow a deactivated user to learn team names they should not access. Root cause: insufficient validation duri...

CVE-2026-20796 Time-of-check time-of-use vulnerability in common teams API

Mattermost versions 10.11.x = 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /commonteams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549...

PT-2026-7984

Name of the Vulnerable Software and Affected Versions Mattermost versions 10.11.0 through 10.11.9 Description Mattermost versions 10.11.0 through 10.11.9 do not properly validate channel membership when retrieving data, potentially allowing a deactivated user to learn team names they should not...

EUVD-2021-31297

Malicious code in bioql PyPI...

CVE-2025-53942

Summary of CVE-2025-53942 (authentik): Affected: authentik identity provider. Issue: deactivated users who registered via OAuth/SAML (or linked accounts) could remain partially active, enabling authorization of applications despite deactivation. Root cause: insufficient check for account active s...

CVE-2023-2788 Deactivated user can retain access using oauth2 api

Mattermost fails to check if an admin user account active after an oauth2 flow is started, allowing an attacker with admin privileges to retain persistent access to Mattermost by obtaining an oauth2 access token while the attacker's account is deactivated...

SUSE CVE-2023-32682

Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions it may be possible for a deactivated user to login when using uncommon configurations. This only applies if any of the following are true: 1. JSON Web Tokens are enabled for login via the...

CVE-2023-32682

Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions it may be possible for a deactivated user to login when using uncommon configurations. This only applies if any of the following are true: 1. JSON Web Tokens are enabled for login via the...