5.4
Medium
CVE-2026-13426 The Mattermost Go module github.com/mattermost/mattermost/server/public versions < v0.1.22 fail to validate path…
Description
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 Advisory ID: MMSA-2025-00532
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/mattermost/mattermost/server/public 0.1 | earliest → < 0.1.22 | 0.1.22 |
| github.com/mattermost/mattermost/server/public 0.0 | 0.0.0 → < 0.1.22 | 0.1.22 |