Low
Hono: Improper validation of NumericDate claims (exp, nbf, iat) in JWT verify()
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-44459
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 03:21 UTC · Revision 1
Source evidence
Hono: Improper validation of NumericDate claims (exp, nbf, iat) in JWT verify()
core-osv · Original sourcePublished 13 May 2026, 15:02 UTC
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.
osv:CVE-2026-44459
Complete source record
{
"id": "e79dee2c271022d56aa5915c95103ecc50bcbfd54a3e1f1a792182d0d059c3a7",
"url": "https://osv.dev/vulnerability/CVE-2026-44459",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Hono: Improper validation of NumericDate claims (exp, nbf, iat) in JWT verify()",
"summary": "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.",
"evidence": "osv:CVE-2026-44459",
"products": [],
"severity": "low",
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"modified": "2026-10-28T02:30:32.807761644Z",
"provider": "osv",
"references": [
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"source_id": "core-osv",
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"published_at": "2026-05-13T15:02:23.872+00:00"
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