Critical
vLLM: OpenAI auth bypass
Type: advisorySources: OSV
vLLM is an inference and serving engine for large language models (LLMs). From 0.3.0 until 0.22.0, a vulnerability in ASGI web servers and starlette's trust on those web servers enables an authentication bypass of the OpenAI API AuthenticationMiddleware. It allows to use the API without providing the configured VLLM_API_KEY or --api-key. This vulnerability is fixed in 0.22.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-48746
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 01:41 UTC · Revision 1
Source evidence
vLLM is an inference and serving engine for large language models (LLMs). From 0.3.0 until 0.22.0, a vulnerability in ASGI web servers and starlette's trust on those web servers enables an authentication bypass of the OpenAI API AuthenticationMiddleware. It allows to use the API without providing the configured VLLM_API_KEY or --api-key. This vulnerability is fixed in 0.22.0.
osv:CVE-2026-48746
Complete source record
{
"id": "6d1ede2e8f51bb2e7cb6bd369e67da8e177e1ab7f086396c8ba7721074ea146f",
"url": "https://osv.dev/vulnerability/CVE-2026-48746",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "vLLM: OpenAI auth bypass",
"summary": "vLLM is an inference and serving engine for large language models (LLMs). From 0.3.0 until 0.22.0, a vulnerability in ASGI web servers and starlette's trust on those web servers enables an authentication bypass of the OpenAI API AuthenticationMiddleware. It allows to use the API without providing the configured VLLM_API_KEY or --api-key. This vulnerability is fixed in 0.22.0.",
"evidence": "osv:CVE-2026-48746",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-48746",
"aliases": [
"CVE-2026-48746",
"GHSA-94f4-hr76-p5j6",
"PYSEC-2026-226"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/vllm-project/vllm",
"type": "GIT",
"events": [
{
"introduced": "1af090b57d0e23d268e79941f8084bf0a8ad8621"
},
{
"fixed": "0b3ba88f165976e77ca5e6a7a3f5bba4562b80af"
}
],
"database_specific": {
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{
"range": [
{
"introduced": "0.3.0"
},
{
"fixed": "0.22.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"cpe": "cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0.3.0"
},
{
"fixed": "0.22.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"v0.22.0rc2",
"v0.22.0rc1",
"v0.21.1rc0",
"v0.20.2rc0",
"v0.20.1rc0",
"v0.19.2rc0",
"v0.19.1rc0",
"v0.18.2rc0",
"v0.18.1rc0",
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"v0.9.2rc1",
"v0.9.1rc2",
"v0.9.1",
"v0.9.1rc1",
"v0.9.0",
"v0.8.4",
"v0.8.3rc1",
"v0.8.2",
"v0.8.1",
"v0.8.0rc2",
"v0.8.0rc1",
"v0.7.3",
"v0.7.2",
"v0.7.1",
"v0.7.0",
"v0.6.6.post1",
"v0.6.6",
"v0.6.5",
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"v0.6.3",
"v0.6.2",
"v0.6.1.post2",
"v0.6.1.post1",
"v0.6.1",
"v0.6.0",
"v0.5.5",
"v0.5.4",
"v0.5.3.post1",
"v0.5.3",
"v0.5.2",
"v0.5.1",
"v0.5.0.post1",
"v0.5.0",
"v0.4.3",
"v0.4.2",
"v0.4.1",
"v0.4.0.post1",
"v0.4.0",
"v0.3.3",
"v0.3.2",
"v0.3.1",
"v0.3.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48746.json"
}
}
],
"modified": "2026-10-28T02:30:25.092100807Z",
"provider": "osv",
"references": [
"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48746.json",
"https://access.redhat.com/errata/RHSA-2026:30088",
"https://access.redhat.com/errata/RHSA-2026:30089",
"https://access.redhat.com/errata/RHSA-2026:36005",
"https://access.redhat.com/errata/RHSA-2026:36006",
"https://access.redhat.com/errata/RHSA-2026:42132",
"https://access.redhat.com/errata/RHSA-2026:42142",
"https://access.redhat.com/errata/RHSA-2026:42644",
"https://access.redhat.com/errata/RHSA-2026:43038",
"https://access.redhat.com/errata/RHSA-2026:61627",
"https://access.redhat.com/errata/RHSA-2026:61629",
"https://access.redhat.com/security/cve/CVE-2026-48746",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48746.json",
"https://github.com/vllm-project/vllm/security/advisories/GHSA-94f4-hr76-p5j6",
"https://nvd.nist.gov/vuln/detail/CVE-2026-48746",
"https://x41-dsec.de/lab/advisories/x41-2026-002-starlette",
"https://bugzilla.redhat.com/show_bug.cgi?id=2491581",
"https://github.com/vllm-project/vllm/pull/43426"
],
"provider_metadata": {
"cwe_ids": [
"CWE-444"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48746.json"
}
},
"related_cves": [
{
"value": "CVE-2026-48746",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 491689,
"published_at": "2026-06-22T21:57:28.997+00:00"
}