CVE-2026-73682

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.

References

• https://github.com/semaphoreui/semaphore
• https://github.com/semaphoreui/semaphore/commit/5d87656a680600125fe78edec1f7a0d10484b52c
• https://github.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8p
• https://github.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8p
• https://www.vulncheck.com/advisories/semaphore-prior-to-version-os-command-injection-via-git-url-repository-handling