Metrics
Affected Vendors & Products
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-2xf7-hmf6-p64j | Mattermost doesn't properly validate channel membership at the time of data retrieval |
Solution
Update Mattermost to versions 11.3.0, 10.11.10 or higher.
Workaround
No workaround given by the vendor.
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
|
Fri, 13 Feb 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost |
|
| Vendors & Products |
Mattermost
Mattermost mattermost |
Fri, 13 Feb 2026 17:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 13 Feb 2026 10:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 /common_teams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549 | |
| Title | Time-of-check time-of-use vulnerability in common teams API | |
| Weaknesses | CWE-367 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-02-13T17:02:25.985Z
Reserved: 2026-01-15T11:34:00.225Z
Link: CVE-2026-20796
Updated: 2026-02-13T17:01:43.299Z
Status : Awaiting Analysis
Published: 2026-02-13T11:16:10.280
Modified: 2026-02-13T14:23:48.007
Link: CVE-2026-20796
No data.
OpenCVE Enrichment
Updated: 2026-02-13T21:28:43Z
Github GHSA