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.

References

https://github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2

https://github.com/semaphoreui/semaphore/releases/tag/v2.19.5-beta5

https://github.com/semaphoreui/semaphore/releases/tag/v2.18.19

https://github.com/semaphoreui/semaphore/commit/bb2a4e1f08c8023e618f8dd6eaca73554f2c33bb

https://github.com/semaphoreui/semaphore/commit/1c4bb65df114962134f8829d4a03667106a01a68

Details

Source: Mitre, NVD

Published: 2026-08-12

Updated: 2026-08-12

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

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

Severity: High