CVE-2026-47673 json
Hono: JWT middleware accepts any Authorization scheme, not only Bearer
published 5mo ago modified 28d ago also EUVD-2026-32927 , GHSA-f577-qrjj-4474
- cvss
- 4.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
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.
Patch / fix
- npm hono 4.12.21
- hono hono 4.12.21
Is CVE-2026-47673 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | hono | <4.12.21 |
4.12.21 |
Affected products
- honojs hono
Classification
- Weakness
-
- CWE-285 Improper Authorization
References
-
github.com
/honojs/hono/commit/5463db2735476959b8af67756f4e513f4fe19115
web
-
github.com
/honojs/hono/security/advisories/GHSA-f577-qrjj-4474
web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-47673
advisory
-
github.com
/honojs/hono
package
-
github.com
/honojs/hono/releases/tag/v4.12.21
web
Sources
- CVE List CVE-2026-47673
- GitHub Advisory GHSA-f577-qrjj-4474
- NVD CVE-2026-47673
- Maintainer advisory GHSA-f577-qrjj-4474
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of honojs/hono published their own advisory on GitHub. Reviewed sources take precedence over it.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.