RCE in Semaphoreui Semaphore
CVE-2026-73294
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/…
Vulnerability class: Command Injection (OS Command Injection)
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Semaphoreui Semaphore — versions < 2.18.17, >= 2.19.0-alpha3, < 2.19.5-beta2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-73294?
- CVE-2026-73294 is a critical-severity vulnerability in Semaphoreui Semaphore, classified under OS Command Injection. CVSS score: 9.9/10. Published 2026-08-12.
- How severe is CVE-2026-73294?
- Critical severity. CVSS v3 base score is 9.9 out of 10.