low3.1
CVE-2026-22545
Mattermost fails to validate user's authentication method when processing account auth type switch
Impact
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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20260127144908-ced9a56e3988 | 8.0.0-20260127144908-ced9a56e3988 |
| go | github.com/mattermost/mattermost-server | < 5.3.2-0.20260127144908-ced9a56e3988 | 5.3.2-0.20260127144908-ced9a56e3988 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 10.11.0 before 10.11.11 |