Missing Authorization Affecting github.com/mattermost/mattermost/server/platform/services/sharedchannel package, versions <10.11.13>=11.5.0-rc1 <11.5.0-rc3
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-GITHUBCOMMATTERMOSTMATTERMOSTSERVERPLATFORMSERVICESSHAREDCHANNEL-16322709
- published30 Apr 2026
- disclosed17 Apr 2026
- creditdaw10
Introduced: 17 Apr 2026
CVE-2026-27769 Â (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/platform/services/sharedchannel to version 10.11.13, 11.5.0-rc3 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authorization in the Connected Workspaces API. An attacker can change the displayed status of local users by connecting a malicious remote server using the Connected Workspaces feature.