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CVE-2026-10085
5.4 MEDIUM
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): None (N)
- Integrity (I): Low (L)
- Availability (A): Low (L)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): None (N)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): Low (L)
- Modified Availability (MA): Low (L)
Activity log
- Created suggestion
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 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
References
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MMSA-2026-00688 vendor-advisory
Affected products
Mattermost
- =<11.6.4
- ==11.6.5
- ==11.8.0
- ==11.7.3
- ==10.11.20
- =<10.11.19
- =<11.7.2
Matching in nixpkgs
pkgs.mattermost
Open source platform for secure collaboration across the entire software development lifecycle
pkgs.mattermostLatest
Open source platform for secure collaboration across the entire software development lifecycle
pkgs.mattermost-desktop
Mattermost Desktop client
pkgs.python313Packages.mattermostdriver
Python Mattermost Driver
Package maintainers
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@mgdelacroix Miguel de la Cruz <mgdelacroix@gmail.com>
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@numinit Morgan Jones <me+nixpkgs@numin.it>
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@ryantm Ryan Mulligan <ryan@ryantm.com>
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@liff Olli Helenius <liff@iki.fi>
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@jokogr Ioannis Koutras <ioannis.koutras@gmail.com>
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@yayayayaka Yaya <github@uwu.is>