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Vulnerabilities CVE-2026-47673

CVE-2026-47673

Medium
Open
TLP:CLEAR

Hono: JWT middleware accepts any Authorization scheme, not only Bearer

NVD CVE.org
Critical Infrastructure

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Description

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.

Details

CVSS Score
4.8
EPSS Score
0.20%

9.9th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Confidence
90%
Published
May 28, 2026
Last Modified
May 28, 2026
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