CVE-2026-22545
Low
Description
Mattermost versions 10.11.x <= 10.11.10 fail to validate user's authentication method when processing account auth type switch which allows an authenticated attacker to change account password without confirmation via falsely claiming a different auth provider.. Mattermost Advisory ID: MMSA-2026-00583
SeverityLow
CVSS3.1
Exploit probability—
Product
Mattermost Server
PublishedMar 16, 2026
First seenMar 16, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- mattermost mattermost_server10.11.11 or later
- github.com/mattermost/mattermost/server/v88.0.0-20260127144908-ced9a56e3988 or later
- github.com/mattermost/mattermost-server5.3.2-0.20260127144908-ced9a56e3988, 10.11.11, 11.2.3, 11.3.1, 10.11.11+incompatible, 11.2.3+incompatible, 11.3.1+incompatible or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 10.11.0 ≤ v < 10.11.11 | 10.11.11 |
| github.com/mattermost/mattermost/server/v8Go | v < 8.0.0-20260127144908-ced9a56e3988 | 8.0.0-20260127144908-ced9a56e3988 |
| github.com/mattermost/mattermost-serverGo | v < 5.3.2-0.20260127144908-ced9a56e3988, 10.11.0-rc1 ≤ v < 10.11.11, 11.2.0-rc1 ≤ v < 11.2.3, 11.3.0-rc1 ≤ v < 11.3.1, 10.11.0-rc1+incompatible ≤ v < 10.11.11+incompatible, 11.2.0-rc1+incompatible ≤ v < 11.2.3+incompatible, 11.3.0-rc1+incompatible ≤ v < 11.3.1+incompatible | 5.3.2-0.20260127144908-ced9a56e3988, 10.11.11, 11.2.3, 11.3.1, 10.11.11+incompatible, 11.2.3+incompatible, 11.3.1+incompatible |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.