Critical
Semaphore U: OS Command Injection
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-73294, CVE-2026-73682
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 08:27 UTC · Revision 1
Source evidence
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.
osv:CVE-2026-73294
Complete source record
{
"id": "a881b43099c4435b7f4cd44a279ba5c9bb1deb0c32366ce048cb33b395a04891",
"url": "https://osv.dev/vulnerability/CVE-2026-73294",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Semaphore U: OS Command Injection",
"summary": "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.",
"evidence": "osv:CVE-2026-73294",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-73294",
"aliases": [
"CVE-2026-73294",
"CVE-2026-73682",
"GHSA-xp7j-h7jc-4w8p",
"GO-2026-6435"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/semaphoreui/semaphore",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "4af0a588f303e04239c1e8886e7e57bd4ad1d652"
},
{
"introduced": "9476b380cd0b5a411bb3ca236ab57a7f6e8a1c25"
},
{
"fixed": "60defb2217512777af3a266f31082c93365a465b"
},
{
"fixed": "7e8a9434bd81b82cf42220151c74801ea97542d6"
},
{
"fixed": "a7a7a33a64aea382a0726b3722856f298663eacf"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.18.17"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "2.19.0-alpha3"
},
{
"fixed": "2.19.5-beta2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "7e8a9434bd81b82cf42220151c74801ea97542d6"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "a7a7a33a64aea382a0726b3722856f298663eacf"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73294.json"
}
}
],
"modified": "2026-10-28T02:30:33.809812147Z",
"provider": "osv",
"references": [
"https://github.com/semaphoreui/semaphore/tree/v2.18.17",
"https://github.com/semaphoreui/semaphore/tree/v2.19.5-beta2",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73294.json",
"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"
],
"provider_metadata": {
"cwe_ids": [
"CWE-78",
"CWE-88"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73294.json"
}
},
"related_cves": [
{
"value": "CVE-2026-73294",
"evidence": "/id"
},
{
"value": "CVE-2026-73682",
"evidence": "/aliases"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 501132,
"published_at": "2026-08-12T15:55:00.56+00:00"
}