CVE-2026-13426: Improper Limitation of a Pathname to a Restricted Directory

The Mattermost Go module github.com/mattermost/mattermost/server/public versions v0.1.22 fail to validate path parameters when constructing API route paths which allows an attacker to redirect API calls to unintended endpoints via crafted IDs containing path traversal components. Mattermost...

GO-2025-4036 Mattermost has an Observable Timing Discrepancy vulnerability in github.com/mattermost/mattermost-server

Mattermost has an Observable Timing Discrepancy vulnerability in github.com/mattermost/mattermost-server...

GO-2022-0604 Cross-site Scripting in Mattermost in github.com/mattermost/mattermost-server

Cross-site Scripting in Mattermost in github.com/mattermost/mattermost-server...

GO-2024-3025 Mattermost failed to disallow the modification of local users when syncing users in shared channels in github.com/mattermost/mattermost-server

Mattermost failed to disallow the modification of local users when syncing users in shared channels in github.com/mattermost/mattermost-server...