CVE-2026-44459 Details
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.
A vulnerability exists in the Hono web application framework, prior to version 4.12.18, due to improper validation of JWT NumericDate claims 'exp', 'nbf', and 'iat' in the 'hono/utils/jwt' module. This flaw allows tokens with non-compliant claim values to silently bypass time-based validations. The issue arises when a malformed claim value is processed by the 'verify()' function, typically when the application issues such tokens or when the signing key is compromised. As a result, tokens may be accepted as valid even when they should have been rejected, potentially leading to unauthorized access or actions.
Users should update to Hono version 4.12.18 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/honojs/hono/security/advisories/GHSA-hm8q-7f3q-5f36 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1284 | Improper Validation of Specified Quantity in Input | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| hono hono | < 4.12.18 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | Initial Analysis | [email protected] |
| May 13, 2026 | New CVE Received | [email protected] |