Information Exposure Affecting github.com/mattermost/mattermost/server/channels/app package, versions >=10.11.0 <10.11.16>=11.5.0 <11.5.5>=11.6.0 <11.6.2>=11.7.0-rc1 <11.7.0-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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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMMATTERMOSTMATTERMOSTSERVERCHANNELSAPP-17661023
- published28 Jun 2026
- disclosed12 Jun 2026
- creditUnknown
Introduced: 12 Jun 2026
CVE-2026-6046 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/channels/app to version 10.11.16, 11.5.5, 11.6.2, 11.7.0-rc3 or higher.
Overview
github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative
Affected versions of this package are vulnerable to Information Exposure via the bot registration process. An attacker can intercept private messages sent by plugins by pre-registering a user account with a predictable bot username.