Incorrect Authorization Affecting github.com/mattermost/mattermost/server/channels/api4 package, versions >=10.11.0 <10.11.18>=11.7.0 <11.7.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMMATTERMOSTMATTERMOSTSERVERCHANNELSAPI4-17661032
- published28 Jun 2026
- disclosed22 Jun 2026
- creditUnknown
Introduced: 22 Jun 2026
NewCVE-2026-8823 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/channels/api4 to version 10.11.18, 11.7.1 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Authorization through the demote-user API process. An attacker can degrade bot accounts to guest status without possessing bot-management permissions by targeting bot accounts as demotion targets.