medium4.8
CVE-2026-47673
Hono is a Web application framework that provides support for any JavaScript runtime.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | hono | < 4.12.21 | 4.12.21 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Hono | Hono | before 4.12.21 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-f577-qrjj-4474
- https://github.com/honojs/hono/security/advisories/GHSA-f577-qrjj-4474
- https://nvd.nist.gov/vuln/detail/CVE-2026-47673
- https://github.com/honojs/hono/commit/5463db2735476959b8af67756f4e513f4fe19115
- https://github.com/honojs/hono/releases/tag/v4.12.21