CVE-2026-9693

Published: Ago 18, 2026 Last Modified: Ago 18, 2026
ExploitDB:
Other exploit source:
Google Dorks:
LOW 3,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: required
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: none

Description

AI Translation Available

Mattermost versions 10.11.x <= 10.11.20, 11.7.x <= 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via the team threads API.. Mattermost Advisory ID: MMSA-2026-00682

459

Incomplete Cleanup

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Other Confidentiality Integrity
Potential Impacts:
Other Read Application Data Modify Application Data Dos: Resource Consumption (Other)
Applicable Platforms
All platforms may be affected
View CWE Details
https://mattermost.com/security-updates
https://mattermost.com/security-updates