2026-05-18 · 1 min · BitNinja Team · AI generated
Server Security Alert: CVE-2026-28759 Details
The recent discovery of CVE-2026-28759 highlights a critical vulnerability affecting Mattermost versions. A flaw in their shared channel membership sync process enables remote clusters to remove users from arbitrary channels without proper authorization. This vulnerability pos...
Understanding CVE-2026-28759 and Its Impact on Server Security
The recent discovery of CVE-2026-28759 highlights a critical vulnerability affecting Mattermost versions. A flaw in their shared channel membership sync process enables remote clusters to remove users from arbitrary channels without proper authorization. This vulnerability poses a significant threat to server security, making it imperative for system administrators and hosting providers to be aware of implications and mitigation steps.
Summary of the Vulnerability
Versions of Mattermost, specifically `11.5.x