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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-73293

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

Description

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, overriding the built-in manager permissions and granting CanUpdateProject and CanManageProjectUsers owner capabilities. This issue is fixed in versions 2.18.19 and 2.19.5-beta5.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

semaphoreui semaphore

  • < 2.18.19affected
  • >= 2.19.0-alpha3, < 2.19.5-beta5affected

References