Semaphore versions prior to 2.18.20 contain an OS command injection (argument injection) vulnerability in the repository git_url handling that allows authenticated users holding the Manager or Owner role on any project to achieve remote code execution on the Semaphore server host. Attackers can craft a malicious git_url value using git's --upload-pack= option to inject and execute arbitrary shell commands when the server processes repository operations using the default cmd_git client.
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Fixes

Solution

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Workaround

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History

Fri, 14 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
Description Semaphore versions prior to 2.18.20 contain an OS command injection (argument injection) vulnerability in the repository git_url handling that allows authenticated users holding the Manager or Owner role on any project to achieve remote code execution on the Semaphore server host. Attackers can craft a malicious git_url value using git's --upload-pack= option to inject and execute arbitrary shell commands when the server processes repository operations using the default cmd_git client.
Title Semaphore prior to version 2.18.20 OS Command Injection via git_url Repository Handling
Weaknesses CWE-88
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-14T21:06:36.069Z

Reserved: 2026-08-13T15:15:35.896Z

Link: CVE-2026-73682

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-14T21:17:58.033

Modified: 2026-08-14T21:17:58.033

Link: CVE-2026-73682

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses