CVE-2026-73293CWE-269privilege-escalation

CVE-2026-73293

High · published August 12, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
46.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00569 · 46.4th percentile
Weakness
CWE-269 · Improper Privilege Management
Published
2026-08-12T20:17Z
References (6)
https://github.com/semaphoreui/semaphore/commit/1c4bb65df114962134f8829d4a03667106a01a68 · [email protected]https://github.com/semaphoreui/semaphore/commit/bb2a4e1f08c8023e618f8dd6eaca73554f2c33bb · [email protected]https://github.com/semaphoreui/semaphore/releases/tag/v2.18.19 · [email protected]https://github.com/semaphoreui/semaphore/releases/tag/v2.19.5-beta5 · [email protected]https://github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2 · [email protected]https://github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 12 AUG 15:45Z
    Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision
    cvelistv5