by Kastro
Paper/Archive/CVE-2026-73294

CVE-2026-73294

semaphoreui semaphore — Semaphore U: OS Command Injection

EPSS 0.7%public exploitCVSS 9.9
critical.is priorityof 100
50
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 51.1.511 × 2010.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
semaphore< 2.18.17–CNA
semaphore>= 2.19.0-alpha3, < 2.19.5-beta2–CNA

Scores by source

GitHub_M (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8prefgithub.com/semaphoreui/semaphore/commit/7e8a9434bd81b82cf42220151c74801ea97542d6refgithub.com/semaphoreui/semaphore/commit/a7a7a33a64aea382a0726b3722856f298663eacfrefgithub.com/semaphoreui/semaphore/tree/v2.18.17refgithub.com/semaphoreui/semaphore/tree/v2.19.5-beta2