Missing Authorization Affecting github.com/mattermost/mattermost/server/channels/api4 package, versions >=10.11.0 <10.11.20>=11.6.0 <11.6.5>=11.7.0 <11.7.3>=11.8.0-rc1 <11.8.0-rc5
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-GITHUBCOMMATTERMOSTMATTERMOSTSERVERCHANNELSAPI4-17970917
- published14 Jul 2026
- disclosed13 Jul 2026
- creditUnknown
Introduced: 13 Jul 2026
NewCVE-2026-10085 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/channels/api4 to version 10.11.20, 11.6.5, 11.7.3, 11.8.0-rc5 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authorization due to insufficient restriction of the group_constrained channel flag in the channel patch API. An attacker can remove all participants from a group or direct message conversation by enabling the group_constrained flag through the API.