Memory Allocation with Excessive Size Value Affecting github.com/mattermost/mattermost/server/channels/app package, versions <10.11.11>=11.2.0-rc1 <11.2.3>=11.3.0-rc1 <11.3.1
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-15702046
- published20 Mar 2026
- disclosed16 Mar 2026
- creditDaniel Espino Garcia
Introduced: 16 Mar 2026
CVE-2026-2456 Â (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/channels/app to version 10.11.11, 11.2.3, 11.3.1 or higher.
Overview
github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative
Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the integration action endpoints. An attacker can exhaust server memory and disrupt service availability by leveraging a malicious integration server to return excessively large responses when a user interacts with an interactive message button.