CVE-2026-73293 Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision

Semaphore UI is a web interface for managing DevOps tools. Prior to 2.18.19 and from 2.19.0-alpha3 until 2.19.5-beta5, ProjectMiddleware and GetProjectOrGlobalRoleBySlug allow a project manager to use POST /api/project/id/roles to create a custom manager role with permission bitmask 15, overridin...