critical9.9
CVE-2026-73294
Semaphore UI is a web interface for managing DevOps tools.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/semaphoreui/semaphore | < 0.0.0-20260704181911-7e8a9434bd81 | 0.0.0-20260704181911-7e8a9434bd81 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-xp7j-h7jc-4w8p
- https://github.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8p
- https://nvd.nist.gov/vuln/detail/CVE-2026-73294
- https://github.com/semaphoreui/semaphore/commit/7e8a9434bd81b82cf42220151c74801ea97542d6
- https://github.com/semaphoreui/semaphore/commit/a7a7a33a64aea382a0726b3722856f298663eacf
- https://github.com/semaphoreui/semaphore/tree/v2.18.17
- https://github.com/semaphoreui/semaphore/tree/v2.19.5-beta2