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Vendor Solution
Update Mattermost to versions 11.6.0, 11.5.2, 10.11.14, 11.4.4 or higher.
Tracking
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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-wvcv-9xpm-7mqc | Mattermost doesn't enforce slash command trigger-word uniqueness during command updates |
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
|
Tue, 19 May 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost mattermost Server
|
|
| CPEs | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Mattermost mattermost Server
|
Mon, 18 May 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 18 May 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost |
|
| Vendors & Products |
Mattermost
Mattermost mattermost |
Mon, 18 May 2026 09:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 commands via editing their own slash command trigger to an already-registered trigger through the command update API. Mattermost Advisory ID: MMSA-2026-00597 | |
| Title | Slash command trigger-word update allowed command hijacking | |
| Weaknesses | CWE-863 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-05-18T14:37:33.547Z
Reserved: 2026-03-16T08:51:03.263Z
Link: CVE-2026-28732
Updated: 2026-05-18T14:37:29.405Z
Status : Analyzed
Published: 2026-05-18T09:16:22.570
Modified: 2026-06-17T10:28:58.110
Link: CVE-2026-28732
No data.
OpenCVE Enrichment
Updated: 2026-05-18T11:30:23Z
Github GHSA