CVE-2026-44459
Hono: Improper validation of NumericDate claims (exp, nbf, iat) in JWT verify()
- State
- Published
- Severity
- 3.8 Low
- Published
- May 13, 2026
- Updated
- Jun 23, 2026
- Reserved
- May 6, 2026
Description
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, improper validation of the JWT NumericDate claims exp, nbf, and iat in hono/utils/jwt allows tokens with non-spec-compliant claim values to silently bypass time-based checks. This issue is not exploitable by an anonymous attacker; it only manifests when a malformed claim value reaches verify() — typically when the application itself issues such tokens, or when the signing key is otherwise under attacker control. This vulnerability is fixed in 4.12.18.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.8 Low | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N | GitHub_M |
Weaknesses
- CWE-1284 Improper Validation of Specified Quantity in Input
Affected Products
| Product | Versions |
|---|---|
honohonojs |
|
References
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