GO-2026-5256Published
Insufficient authorization in shared channel membership sync allows remote cluster to remove users from arbitrary channels
Explicit identifiers and source references
These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.
CVE-2026-28759 · Microsoft / collected KEV context
cve-program · CVE-2026-28759
euvd · EUVD-2026-30738
nvd · CVE-2026-28759
osv · GHSA-8h9w-w78c-vvr3
- https://nvd.nist.gov/vuln/detail/CVE-2026-28759
- https://github.com/mattermost/mattermost/commit/8738f8c4b3d42b2b687a6231e72f313357a2e891
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
osv · GO-2026-5256
Related operational evidence
Explicit CVE identifiersNo related operational record is retained in the current change model.