Mattermost has a Path Traversal issue
Go github.com/mattermost/mattermost-server · Upgrade to 11.6.1, 11.5.4, 11.4.5 or 10.11.15 by release line · >= 11.6.0, <= 11.6.0; >= 11.5.0, < 11.5.4; >= 11.4.0, < 11.4.5; >= 10.11.0, < 10.11.15 · CVE-2026-4858 · GHSA-c4r7-j7pp-r8mp