CVE-2026-47673

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.

PUBLISHED Reserved 2026-05-19 | Published 2026-05-28 | Updated 2026-05-30 | Assigner GitHub_M

Problem types

CWE-285: Improper Authorization

Product status

References

github.com/...s/hono/security/advisories/GHSA-f577-qrjj-4474

cve.org (CVE-2026-47673)

nvd.nist.gov (CVE-2026-47673)

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