CVE-2026-58657 Grav - Stored CSS Injection via Markdown Image resize() Action

Grav before 2.0.0 affected through 2.0.0-rc.9 and the 2.0 branch contains a stored CSS injection vulnerability in the Markdown image resize media action. Prior media hardening rejects direct ?style= payloads and unsafe attribute fallbacks, but the resize action in Excerpts::processMediaActions...