Incorrect Authorization Affecting github.com/mattermost/mattermost/server/v8/channels/api4 package, versions >=10.11.0-rc1 <10.11.15-rc1>=11.4.0-rc1 <11.4.5>=11.5.0-rc1 <11.5.3>=11.6.0-rc1 <11.6.1-rc1
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-GITHUBCOMMATTERMOSTMATTERMOSTSERVERV8CHANNELSAPI4-16873784
- published24 May 2026
- disclosed22 May 2026
- creditrunup
Introduced: 22 May 2026
NewCVE-2026-3636 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/v8/channels/api4 to version 10.11.15-rc1, 11.4.5, 11.5.3, 11.6.1-rc1 or higher.
Overview
github.com/mattermost/mattermost/server/v8/channels/api4 is a platform for secure collaboration across the entire software development lifecycle
Affected versions of this package are vulnerable to Incorrect Authorization via the API response process. An attacker can access sensitive information about team member roles by invoking various team API endpoints without having elevated permissions.