CVE-2026-16048 — Channel member roles accept out-of-scope roles
Mattermost versions 11.8.x <= 11.8.2, 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to restrict channel member role assignment to channel-scoped roles which allows a channel admini…
Published: 2026-08-17 · CVSS: 6.3 · CVSS 3.1
Mattermost versions 11.8.x <= 11.8.2, 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to restrict channel member role assignment to channel-scoped roles which allows a channel administrator to gain additional channel permissions via the channel member roles API.. Mattermost Advisory ID: MMSA-2026-00697
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7