GHSA-77PV-3W4Q-VRJ5 OpenClaw: QQBot pre-dispatch slash commands could skip allowFrom checks

Summary QQBot pre-dispatch slash commands could skip allowFrom checks. In affected versions, a QQBot sender able to invoke slash commands could dispatch the command before applying the configured allowFrom policy. This advisory is scoped to the named feature and configuration. It does not change...

GO-2026-5671 Mattermost doesn't validate the Host header when constructing response URLs for custom slash command in github.com/mattermost/mattermost-server

Mattermost doesn't validate the Host header when constructing response URLs for custom slash command in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is...

GO-2026-5726 Mattermost doesn't enforce slash command trigger-word uniqueness during command updates in github.com/mattermost/mattermost-server

Mattermost doesn't enforce slash command trigger-word uniqueness during command updates in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing...

CVE-2026-5139

Mattermost versions 11.7.x slash command.. Mattermost Advisory ID: MMSA-2026-00644...

CVE-2026-5139 GitLab Plugin Allows Non-Admin Users to Modify Default Instance Configuration

Mattermost versions 11.7.x slash command.. Mattermost Advisory ID: MMSA-2026-00644...

EUVD-2026-38246

Mattermost versions 11.7.x slash command.. Mattermost Advisory ID: MMSA-2026-00644...

CVE-2026-5139

Mattermost plugin vulnerability CVE-2026-5139 affects Mattermost versions 11.7.x ≤ 11.7.0, 11.6.x ≤ 11.6.2, 11.5.x ≤ 11.5.5, 10.11.x ≤ 10.11.17. The issue arises in the /gitlab connect command handler where administrator authorization is not enforced for the setDefaultInstance call, allowing any ...

CVE-2026-5139 GitLab Plugin Allows Non-Admin Users to Modify Default Instance Configuration

Mattermost versions 11.7.x slash command.. Mattermost Advisory ID: MMSA-2026-00644...

PT-2026-51304

Name of the Vulnerable Software and Affected Versions Mattermost version 11.7.0 Mattermost version 11.6.2 Mattermost version 11.5.5 Mattermost version 10.11.17 Description Improper authorization in the GitLab connect command handler allows any authenticated user to overwrite the global default...

CVE-2026-53824 Mattermost plugin for OpenClaw < 2026.4.24 - Slash Token Revocation Lag via Monitor Refresh Delay

OpenClaw before 2026.4.24 contains a token revocation vulnerability allowing callers with revoked slash tokens to continue executing commands during monitor refresh windows. Attackers can exploit stale token acceptance to invoke slash command behavior briefly after token revocation, potentially...

CVE-2026-6333

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the command update API. An attacker can impersonate existing system or custom commands by editing their own slash command trigger to match an already-registered trigger, potentially hijacking command...

Mattermost doesn't enforce slash command trigger-word uniqueness during command updates

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

Mattermost doesn't validate the Host header when constructing response URLs for custom slash command

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

CVE-2026-6333

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

CVE-2026-28732 Slash command trigger-word update allowed command hijacking

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

CVE-2026-28732

Mattermost fixes are for versions 11.5.x (up to 11.5.1), 10.11.x (up to 10.11.13), and 11.4.x (up to 11.4.3). The issue is a failure to enforce slash command trigger-word uniqueness during command updates, allowing an authenticated team member with Manage Own Slash Commands permission to hijack o...

CVE-2026-28732

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

CVE-2026-28732 Slash command trigger-word update allowed command hijacking

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

PT-2026-41649

Name of the Vulnerable Software and Affected Versions Mattermost versions prior to 11.5.2 Mattermost versions prior to 10.11.14 Mattermost versions prior to 11.4.4 Description An issue exists where the system fails to enforce trigger-word uniqueness during the update of slash commands. This allow...