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CVE-2026-73293— Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision

Quick assessment

Affected
semaphoreui semaphore
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Semaphore UI是Semaphore UI组织的一款持续集成和交付管理工具。 Semaphore UI 2.18.19之前版本和2.19.0-alpha3版本至2.19.5-beta5之前版本存在权限许可和访问控制问题漏洞，该漏洞源于ProjectMiddleware和GetProjectOrGlobalRoleBySlug存在权限控制不当，允许项目经理通过POST /api/project/{id}/roles创建具有权限位掩码15的自定义管理器角色，覆盖内置管理器权限并授予CanUpdateP

CVSS 8.8 · High EPSS 0.57% · P46

Affected Version Matrix 2

VendorProduct Version RangeStatus
semaphoreui semaphore < 2.18.19 affected
>= 2.19.0-alpha3, < 2.19.5-beta5 affected
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I. Basic Information for CVE-2026-73293

Vulnerability Information
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Vulnerability Title
Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Semaphore UI 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Semaphore UI是Semaphore UI组织的一款持续集成和交付管理工具。 Semaphore UI 2.18.19之前版本和2.19.0-alpha3版本至2.19.5-beta5之前版本存在权限许可和访问控制问题漏洞，该漏洞源于ProjectMiddleware和GetProjectOrGlobalRoleBySlug存在权限控制不当，允许项目经理通过POST /api/project/{id}/roles创建具有权限位掩码15的自定义管理器角色，覆盖内置管理器权限并授予CanUpdateP
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
semaphoreui semaphore < 2.18.19 -

II. Public POCs for CVE-2026-73293

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8565 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-73293

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Patches & Fixes for CVE-2026-73293 (3)

Vendor Advisories for CVE-2026-73293 (1)

Vendor Pages for CVE-2026-73293 (1)

Same Patch Batch · semaphoreui · 2026-08-12 · 3 CVEs total

CVE-2026-73294 9.9 CRITICAL Semaphore U: OS Command Injection
CVE-2026-73292 8.3 HIGH Semaphore UI: CSRF vulnerability on password change endpoint - No CSRF token or password c

IV. Related Vulnerabilities

Same product: semaphore
Same vendor: semaphoreui
Same weakness: CWE-269

V. Comments for CVE-2026-73293

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