CVE-2026-73293
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductGithub.com/semaphoreui/semaphore
PublishedAug 12, 2026
First seenAug 12, 2026
Weakness typeCWE-269Improper privilege management
How to fix
Update
- github.com/semaphoreui/semaphore0.0.0-20260705182501-bb2a4e1f08c8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/semaphoreui/semaphoreGo | v < 0.0.0-20260705182501-bb2a4e1f08c8 | 0.0.0-20260705182501-bb2a4e1f08c8 |
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