Cross-site Request Forgery (CSRF) Affecting github.com/mattermost/mattermost/server/channels/api4 package, versions >=10.11.0 <10.11.11>=11.2.0 <11.2.3>=11.3.0 <11.3.2>=11.4.0 <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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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMMATTERMOSTMATTERMOSTSERVERCHANNELSAPI4-15855775
- published31 Mar 2026
- disclosed25 Mar 2026
- creditJoshua Rogers
Introduced: 25 Mar 2026
NewCVE-2026-27659 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/channels/api4 to version 10.11.11, 11.2.3, 11.3.2, 11.4.1 or higher.
Overview
Affected versions of this package are vulnerable to Cross-site Request Forgery (CSRF) via the UpdateAccessControlPolicyActiveStatus endpoint. An attacker can change the active status of access control policies by tricking an authenticated administrator into submitting a crafted request.