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CVE-2026-73294— Semaphore U: OS Command Injection

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 2.18.17之前版本和2.19.5-beta2之前版本存在命令注入漏洞，该漏洞源于仓库git_url处理将攻击者控制的--upload-pack选项传递给CmdGitClient.GetLastRemoteCommitHash，通过POST /api/project/{id}/repositories和定时commit-hash轮询，允许项目经理或所有者执行任意操作系统命令。

CVSS 9.9 · Critical EPSS 0.65% · P50

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 2

VendorProduct Version RangeStatus
semaphoreui semaphore < 2.18.17 affected
>= 2.19.0-alpha3, < 2.19.5-beta2 affected
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I. Basic Information for CVE-2026-73294

Vulnerability Information
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Vulnerability Title
Semaphore U: OS Command Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Semaphore UI is a web interface for managing DevOps tools. Prior to 2.18.17 and 2.19.5-beta2, repository git_url handling passes an attacker-controlled --upload-pack option to CmdGitClient.GetLastRemoteCommitHash through POST /api/project/{id}/repositories and scheduled commit-hash polling, allowing a project Manager or Owner to execute arbitrary OS commands in the Semaphore server process. This issue is fixed in versions 2.18.17 and 2.19.5-beta2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Semaphore UI 命令注入漏洞
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 2.18.17之前版本和2.19.5-beta2之前版本存在命令注入漏洞，该漏洞源于仓库git_url处理将攻击者控制的--upload-pack选项传递给CmdGitClient.GetLastRemoteCommitHash，通过POST /api/project/{id}/repositories和定时commit-hash轮询，允许项目经理或所有者执行任意操作系统命令。
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 < 2.18.17 -

II. Public POCs for CVE-2026-73294

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7470 chars
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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
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III. Intelligence Information for CVE-2026-73294

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Patches & Fixes for CVE-2026-73294 (2)

Vendor Advisories for CVE-2026-73294 (1)

Other References for CVE-2026-73294 (1)

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

CVE-2026-73293 8.8 HIGH Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision
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-78

V. Comments for CVE-2026-73294

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