CVE-2026-73293
Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision
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.
INFO
Published Date :
Aug. 12, 2026, 4:17 p.m.
Last Modified :
Oct. 24, 2026, 3:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update Semaphore UI to version 2.18.19 or later.
- Apply security patches for affected versions.
- Verify role permissions after update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-73293.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-73293 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-73293
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-73293 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-73293 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: semaphore de semaphoreui, Description: Semaphore UI es una interfaz web para gestionar herramientas DevOps. Antes de la versión 2.18.19 y desde la 2.19.0-alpha3 hasta la 2.19.5-beta5, ProjectMiddleware y GetProjectOrGlobalRoleBySlug permiten a un gestor de proyectos usar POST /API/project/{id}/roles para crear un rol de gestor personalizado con una máscara de bits de permisos 15, anulando los permisos de gestor integrados y otorgando las capacidades de propietario CanUpdateProject y CanManageProjectUsers. Este problema está solucionado en las versiones 2.18.19 y 2.19.5-beta5. Title: semaphore de semaphoreui, Description: Semaphore UI es una interfaz web para gestionar herramientas DevOps. Antes de la versión 2.18.19 y desde la 2.19.0-alpha3 hasta la 2.19.5-beta5, ProjectMiddleware y GetProjectOrGlobalRoleBySlug permiten a un gestor de proyectos usar POST /API/project/{id}/roles para crear un rol de gestor personalizado con una máscara de bits de permisos 15, anulando los permisos de gestor integrados y otorgando las capacidades de propietario CanUpdateProject y CanManageProjectUsers. Este problema está solucionado en las versiones 2.18.19 y 2.19.5-beta5. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: semaphore de semaphoreui, Description: Semaphore UI es una interfaz web para gestionar herramientas DevOps. Antes de la versión 2.18.19 y desde la 2.19.0-alpha3 hasta la 2.19.5-beta5, ProjectMiddleware y GetProjectOrGlobalRoleBySlug permiten a un gestor de proyectos usar POST /API/project/{id}/roles para crear un rol de gestor personalizado con una máscara de bits de permisos 15, anulando los permisos de gestor integrados y otorgando las capacidades de propietario CanUpdateProject y CanManageProjectUsers. Este problema está solucionado en las versiones 2.18.19 y 2.19.5-beta5. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 12, 2026
Action Type Old Value New Value Added Reference https://github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2 Added SSVC {'id': 'CVE-2026-73293', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-12T16:56:05.968430Z'} -
New CVE Received by [email protected]
Aug. 12, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'semaphoreui', 'product': 'semaphore', 'versions': [{'status': 'affected', 'version': '< 2.18.19'}, {'status': 'affected', 'version': '>= 2.19.0-alpha3, < 2.19.5-beta5'}]}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-269 Added Reference https://github.com/semaphoreui/semaphore/commit/1c4bb65df114962134f8829d4a03667106a01a68 Added Reference https://github.com/semaphoreui/semaphore/commit/bb2a4e1f08c8023e618f8dd6eaca73554f2c33bb Added Reference https://github.com/semaphoreui/semaphore/releases/tag/v2.18.19 Added Reference https://github.com/semaphoreui/semaphore/releases/tag/v2.19.5-beta5 Added Reference https://github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2