Spinnaker: RCE via expression parsing due to unrestricted context handling

Spinnaker is an open source, multi-cloud continuous delivery platform. Echo like some other services, uses SPeL Spring Expression Language to process information - specifically around expected artifacts. In versions prior to 2026.1.0, 2026.0.1, 2025.4.2, and 2025.3.2, unlike orca, it was NOT...