| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-679f-wmrg-qf57 | Mattermost allows a removed team member to enumerate all public channels within a private team |
Solution
Update Mattermost to versions 11.4.0, 11.3.1, 11.2.3, 10.11.11 or higher.
Workaround
No workaround given by the vendor.
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
|
Wed, 18 Mar 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost Server |
|
| CPEs | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Mattermost
Mattermost mattermost Server |
Mon, 16 Mar 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 16 Mar 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly validate team membership when searching channels which allows a removed team member to enumerate all public channels within a private team via the channel search API endpoint.. Mattermost Advisory ID: MMSA-2025-00568 | |
| Title | Unauthorized channel enumeration in private teams after member removal | |
| Weaknesses | CWE-862 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-03-16T13:49:57.631Z
Reserved: 2026-02-13T11:08:09.268Z
Link: CVE-2026-2458
Updated: 2026-03-16T13:44:13.623Z
Status : Analyzed
Published: 2026-03-16T14:19:29.543
Modified: 2026-03-18T17:48:32.877
Link: CVE-2026-2458
No data.
OpenCVE Enrichment
No data.
Github GHSA