CVE-2026-44459: Hono is a Web application framework that provides support for any JavaScript runtime

Routine

LOW 3.8UPGRADE

CVE-2026-44459 is a low-severity flaw (CVSS 3.8) affecting hono. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.8 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-1284
Published	2026-05-13
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: hono

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-13 16:16 UTCPublished CVE record published
2026-10-26 14:10 UTCUpdated Record last modified

hono hono UPGRADE

Affected: < 4.12.18

Fixed in: 4.12.18

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls hono

2. UPGRADE to 4.12.18

npm install hono@">=4.12.18"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44459?

hono: upgrade to 4.12.18. Exact commands for each OS are on this page.

Is CVE-2026-44459 being exploited?

CVE-2026-44459 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44459 affect?

CVE-2026-44459 affects hono. Severity is low (CVSS 3.8). 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

How urgent is CVE-2026-44459?

Priority 16/100. No elevated risk signals yet.

Related CVEs

CVE-2026-44456 MEDIUM 6.5 UPGRADE Hono is a Web application framework that provides support for any JavaScript runtime
CVE-2026-44457 MEDIUM 5.3 UPGRADE Hono is a Web application framework that provides support for any JavaScript runtime
CVE-2026-44455 MEDIUM 4.7 UPGRADE Hono is a Web application framework that provides support for any JavaScript runtime
CVE-2026-44458 MEDIUM 4.3 UPGRADE Hono is a Web application framework that provides support for any JavaScript runtime
CVE-2026-56761 MEDIUM 4.3 UPGRADE hono before 4.12.14 contains an html injection vulnerability in jsx server-side rendering that allows attacker

References

← Back to latest CVEs