Improper Check for Unusual or Exceptional Conditions Affecting github.com/mattermost/mattermost/server/channels/app package, versions <10.11.2>=11.2.0-rc1 <11.2.4>=11.3.0-rc1 <11.3.2>=11.4.0-rc1 <11.4.1
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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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMMATTERMOSTMATTERMOSTSERVERCHANNELSAPP-15855739
- published31 Mar 2026
- disclosed25 Mar 2026
- creditmk7120
Introduced: 25 Mar 2026
CVE-2026-20719 Â (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/channels/app to version 10.11.2, 11.2.4, 11.3.2, 11.4.1 or higher.
Overview
github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative
Affected versions of this package are vulnerable to Improper Check for Unusual or Exceptional Conditions through the rendering process of external SVGs on link embeds. An attacker can cause the web and desktop applications to crash by embedding malicious external SVGs in links, leading to service disruption.