Vulnerabilities CVE-2026-73293

CVE-2026-73293

High

Open

TLP:CLEAR

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

NVD CVE.org

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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.

Details

CVSS Score: 8.8
EPSS Score ⓘ: 0.40%

33.1th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Confidence: 90%
Published: Aug 12, 2026
Last Modified: Aug 12, 2026

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