Critical
Security advisory
Multipart-file uploads call variables to be improperly registered in the global scope. In cases where variables are not declared explicitly before being used this can lead to unexpected behavior. This affects all supported versions of HHVM prior to the patch (3.25.1, 3.24.5, and 3.21.9 and below).
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-6334
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:28 UTC · Revision 1
Source evidence
Multipart-file uploads call variables to be improperly registered in the global scope. In cases where variables are not declared explicitly before being used this can lead to unexpected behavior. This affects all supported versions of HHVM prior to the patch (3.25.1, 3.24.5, and 3.21.9 and below).
osv:CVE-2018-6334
Complete source record
{
"id": "ea0611171c1362c9518fba703d2ddda4beb713d3d355d1048faecef591ff8e26",
"url": "https://osv.dev/vulnerability/CVE-2018-6334",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-6334",
"summary": "Multipart-file uploads call variables to be improperly registered in the global scope. In cases where variables are not declared explicitly before being used this can lead to unexpected behavior. This affects all supported versions of HHVM prior to the patch (3.25.1, 3.24.5, and 3.21.9 and below).",
"evidence": "osv:CVE-2018-6334",
"products": [],
"severity": "critical",
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}
],
"affected": [
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"type": "GIT",
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{
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{
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{
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{
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{
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{
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"source": "CPE_RANGE"
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{
"range": [
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],
"source": "REFERENCES_COMMIT"
}
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}
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"HHVM-3.21.7",
"HHVM-3.24.3",
"HHVM-3.24.2",
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"HHVM-3.24.0",
"HHVM-3.21.5",
"HHVM-3.21.4",
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"HHVM-3.21.2",
"HHVM-3.21.1",
"HHVM-3.21.0",
"gcc-4.6",
"HPHP-2.1.0",
"src-hphp",
"pre-hhvm"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-6334.json",
"vanir_signatures": [
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"source": "https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff",
"target": {
"file": "hphp/runtime/server/upload.cpp",
"function": "rfc1867PostHandler"
},
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"signature_type": "Function",
"signature_version": "v1"
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{
"id": "CVE-2018-6334-b5d732fc",
"digest": {
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"source": "https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff",
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"modified": "2026-10-20T13:40:04.063003636Z",
"provider": "osv",
"references": [
"https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff",
"https://hhvm.com/blog/2018/03/30/hhvm-3.25.2.html"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2018-6334",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 387939,
"published_at": "2018-12-31T19:29:00.323+00:00"
}