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CVE-2026-91181
6.5 MEDIUM
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): High (H)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): High (H)
- Integrity (I): High (H)
- Availability (A): None (N)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): High (H)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): High (H)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): High (H)
- Modified Availability (MA): None (N)
Activity log
- Created suggestion
Data Retention Teams Endpoint Leaks Private Team Invite ID
Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 Fail to sanitize Team objects returned by the data retention teams endpoint which allows an authenticated user holding only the read-only Data Retention Policy permission to obtain a private team's secret invite_id and email, and use it to join the team without authorization, via GET /api/v4/data_retention/policies/{policy_id}/teams.. Mattermost Advisory ID: MMSA-2026-00702
References
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MMSA-2026-00702 vendor-advisory
Affected products
Mattermost
- ==11.7.8
- =<11.7.7
- ==11.9.1
- ==10.11.23
- ==11.10.0
- ==11.8.5
- =<10.11.22
- =<11.8.4
- =<11.9.0
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
pkgs.python314Packages.mattermostdriver
Python Mattermost Driver
Package maintainers
-
@ryantm Ryan Mulligan <ryan@ryantm.com>
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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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@jokogr Ioannis Koutras <ioannis.koutras@gmail.com>
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@liff Olli Helenius <liff@iki.fi>
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@yayayayaka Yaya <github@uwu.is>