Metrics
Affected Vendors & Products
No advisories yet.
Solution
Update Mattermost to versions 11.11.0, 11.10.1, 11.7.10, 11.9.2, 11.8.6 or higher.
Workaround
No workaround given by the vendor.
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
|
Fri, 16 Oct 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 16 Oct 2026 07:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to verify the integrity of the SAML RelayState POST parameter which allows an authenticated SAML user to join any team, including invite-only teams, via forging the team_id or invite_id fields in the RelayState.. Mattermost Advisory ID: MMSA-2026-00727 | |
| Title | Mattermost SAML RelayState forgery allows unauthorized team membership | |
| Weaknesses | CWE-472 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-10-16T14:18:12.181Z
Reserved: 2026-07-21T10:00:44.943Z
Link: CVE-2026-16453
Updated: 2026-10-16T14:17:55.882Z
Status : Awaiting Analysis
Published: 2026-10-16T08:17:12.640
Modified: 2026-10-16T19:23:18.623
Link: CVE-2026-16453
No data.
OpenCVE Enrichment
Updated: 2026-10-16T15:00:16Z