Missing Authentication for Critical Function Affecting github.com/mattermost/mattermost/server/public/model package, versions >=10.11.0 <10.11.18>=11.5.0 <11.5.6>=11.6.0 <11.6.3>=11.7.0 <11.7.1>=11.8.0-rc1 <11.8.0-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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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMMATTERMOSTMATTERMOSTSERVERPUBLICMODEL-17705672
- published30 Jun 2026
- disclosed22 Jun 2026
- creditUnknown
Introduced: 22 Jun 2026
CVE-2026-6673 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/public/model to version 10.11.18, 11.5.6, 11.6.3, 11.7.1, 11.8.0-rc3 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authentication for Critical Function in the POST /ac/installed process during the pending-install window. An attacker can inject a rogue sharedSecret and disrupt the integration by sending unauthenticated requests.