CVE-2026-2463
March 16, 2026
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to filter invite IDs based on user permissions, which allows regular users to bypass access control restrictions and register unauthorized accounts via leaked invite IDs during team creation.. Mattermost Advisory ID: MMSA-2025-00565
Affected Packages
github.com/mattermost/mattermost/server/v8 (GO):
Affected version(s) >=v8.0.0-20230429093631-aac4f2337933 <v8.0.0-20260105134819-cc427af41b2aFix Suggestion:
Update to version v8.0.0-20260105134819-cc427af41b2agithub.com/mattermost/mattermost-server (GO):
Affected version(s) >=v11.2.0-rc1 <v11.2.3Fix Suggestion:
Update to version v11.2.3github.com/mattermost/mattermost (GO):
Affected version(s) =v11.3.0 <v11.3.1Fix Suggestion:
Update to version v11.3.1github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.11.0-rc1 <v10.11.11Fix Suggestion:
Update to version v10.11.11github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.11.0 <v10.11.11Fix Suggestion:
Update to version v10.11.11github.com/mattermost/mattermost (GO):
Affected version(s) >=v11.2.0 <v11.2.3Fix Suggestion:
Update to version v11.2.3github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v11.3.0-rc1 <v11.3.1Fix Suggestion:
Update to version v11.3.1Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Missing Authorization
EPSS
Base Score:
0.02
