CVE-2026-10085 — Ordinary group/direct message member can enable group_constrained and remove all channel participants
Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict the group_constrained channel flag to public and private channels that support group…
Published: 2026-07-13 · CVSS: 5.4 · CVSS 3.1
Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict the group_constrained channel flag to public and private channels that support group synchronization, which allows an ordinary group or direct message member to remove all participants from the conversation via the channel patch API.. Mattermost Advisory ID: MMSA-2026-00688
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7