Description
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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| semaphoreui | semaphore | < 2.18.17, >= 2.19.0-alpha3, < 2.19.5-beta2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | govulncheck-vulndb | 0.0.20260916T180043-160000.1.1 | SUSE-SU-2026:23863-1, SUSE-SU-2026:23855-1 |
| SLES 16.0 | govulncheck-vulndb | 0.0.20260916T180043-160000.1.1 | SUSE-SU-2026:23863-1, SUSE-SU-2026:23855-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260916T180043-160000.1.1 | openSUSE-SU-2026:21897-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/semaphoreui/semaphore | < 0.0.0-20260704181911-7e8a9434bd81 | 0.0.0-20260704181911-7e8a9434bd81 | GHSA-xp7j-h7jc-4w8p |
Advisories 3
- SUSE-SU-2026:23863-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 27, 2026
- SUSE-SU-2026:23855-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 27, 2026
- openSUSE-SU-2026:21897-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 25, 2026
References
- https://github.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8p
- 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