GHSA-CXVF-GVFQ-36W2 Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision

Summary Semaphore resolves a project member's effective permissions in ProjectMiddleware by looking up a role row whose slug matches the member's assigned role, and overwrites the built-in permission bitmask with that row's value. A member holding the built-in manager role creates a custom projec...

CVE-2026-73293

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...

CVE-2026-73293

CVE-2026-73293 affects Semaphore UI. Prior to 2.18.19 and from 2.19.0-alpha3 until 2.19.5-beta5, the combination of ProjectMiddleware and GetProjectOrGlobalRoleBySlug allows a project manager to create a custom manager role via POST /api/project/{id}/roles with permission bitmask 15, which overri...

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...

CVE-2026-73293

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...