CVE-2026-105661 – Requesting `/{username}/-/repositories` for an individual user instead of an organization

Requesting `/{username}/-/repositories` for an individual user instead of an organization made the organization home handler dereference a nil organization and panic. The request needs no authentication and no special configuration. The server answered with an HTTP 500 error and logged a panic for each request; the fix returns 404 for individual users.