Protection Mechanism Failure Affecting github.com/mattermost/mattermost/server/channels package, versions >=10.11.0 <10.11.19>=11.5.0 <11.5.7>=11.6.0 <11.6.4
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-GITHUBCOMMATTERMOSTMATTERMOSTSERVERCHANNELS-17661034
- published28 Jun 2026
- disclosed26 Jun 2026
- creditUnknown
Introduced: 26 Jun 2026
CVE-2026-3472 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/channels to version 10.11.19, 11.5.7, 11.6.4 or higher.
Overview
Affected versions of this package are vulnerable to Protection Mechanism Failure via the rendering of AI bot tool result posts containing injected markdown image syntax. An attacker can exfiltrate data to an attacker-controlled server by crafting malicious content that is rendered by a victim's client.