CVE-2026-22545

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

Affected packages (6)

• Go/github.com/mattermost/mattermost-serverfrom 0, < 5.3.2-0.20260127144908-ced9a56e3988
• Go/github.com/mattermost/mattermost-server>= 10.11.0-rc1+incompatible, < 10.11.11+incompatible, >= 11.2.0-rc1+incompatible, < 11.2.3+incompatible, >= 11.3.0-rc1+incompatible, < 11.3.1+incompatible
• Go/github.com/mattermost/mattermost-server/v5from 0
• Go/github.com/mattermost/mattermost-server/v6from 0
• Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20260127144908-ced9a56e3988
• Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20260127144908-ced9a56e3988

CVSS scores

References (5)

• ADVISORYhttps://github.com/advisories/GHSA-rv67-7w2g-7976
• ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-22545
• PATCHhttps://github.com/mattermost/mattermost
• WEBhttps://github.com/mattermost/mattermost/commit/ced9a56e3988fe9fd4559d45f9971dbd562e2218
• WEBhttps://mattermost.com/security-updates