Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision
Summary
| CVE | CVE-2026-73293 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-12 16:17:22 UTC |
| Updated | 2026-08-12 17:17:32 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types: CWE-269 | CWE-269 CWE-269: Improper Privilege Management
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Semaphoreui | Semaphore | affected < 2.18.19 | Not specified |
| CNA | Semaphoreui | Semaphore | affected >= 2.19.0-alpha3, < 2.19.5-beta5 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/semaphoreui/semaphore/releases/tag/v2.19.5-beta5 | [email protected] | github.com | |
| github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | github.com | |
| github.com/semaphoreui/semaphore/releases/tag/v2.18.19 | [email protected] | github.com | |
| github.com/semaphoreui/semaphore/commit/1c4bb65df114962134f8829d4a036671... | [email protected] | github.com | |
| github.com/semaphoreui/semaphore/commit/bb2a4e1f08c8023e618f8dd6eaca7355... | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.