CVE-2026-73293 HIGH

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

Vendor Semaphoreui
Product semaphore
Weakness CWE-269
Published August 12, 2026
Last update August 12, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 12, 2026 CVE published

Related vulnerabilities

04Related CVE

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