Medium
Hono: JWT middleware accepts any Authorization scheme, not only Bearer
Type: advisorySources: OSV
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, the jwt and jwk middlewares do not verify that the Authorization header value uses theBearer scheme. Any two-part header value — regardless of the scheme name in the first position — proceeds to JWT verification. A request presenting a valid JWT under a non-Bearer scheme identifier (such as Basic or Token) is authenticated identically to a correctly formed Bearer request. This vulnerability is fixed in 4.12.21.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-47673
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 20:05 UTC · Revision 1
Source evidence
Hono: JWT middleware accepts any Authorization scheme, not only Bearer
core-osv · Original sourcePublished 28 May 2026, 15:29 UTC
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, the jwt and jwk middlewares do not verify that the Authorization header value uses theBearer scheme. Any two-part header value — regardless of the scheme name in the first position — proceeds to JWT verification. A request presenting a valid JWT under a non-Bearer scheme identifier (such as Basic or Token) is authenticated identically to a correctly formed Bearer request. This vulnerability is fixed in 4.12.21.
osv:CVE-2026-47673
Complete source record
{
"id": "b14d44f7095fbdbba25d174e812aa6f433f86ee05ee9231a844a23f35ce897e0",
"url": "https://osv.dev/vulnerability/CVE-2026-47673",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Hono: JWT middleware accepts any Authorization scheme, not only Bearer",
"summary": "Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, the jwt and jwk middlewares do not verify that the Authorization header value uses theBearer scheme. Any two-part header value — regardless of the scheme name in the first position — proceeds to JWT verification. A request presenting a valid JWT under a non-Bearer scheme identifier (such as Basic or Token) is authenticated identically to a correctly formed Bearer request. This vulnerability is fixed in 4.12.21.",
"evidence": "osv:CVE-2026-47673",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-47673",
"aliases": [
"CVE-2026-47673",
"GHSA-f577-qrjj-4474"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
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"type": "GIT",
"events": [
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{
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{
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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{
"cpe": "cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*",
"range": [
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],
"modified": "2026-10-28T02:30:23.349882314Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47673.json",
"https://github.com/honojs/hono/security/advisories/GHSA-f577-qrjj-4474",
"https://nvd.nist.gov/vuln/detail/CVE-2026-47673"
],
"provider_metadata": {
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],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47673.json"
}
},
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{
"value": "CVE-2026-47673",
"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 489623,
"published_at": "2026-05-28T15:29:44.16+00:00"
}