Mattermost Github.com/mattermost/mattermost/server/public vulnerabilities

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Published CVEs affecting Mattermost Github.com/mattermost/mattermost/server/public: 1 record(s), with affected versions and fixes.

CVE-2026-13426 Medium · 5.4 CWE-22 Jun 26, 2026

Client4 fails to validate path parameters

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