How severe is CVE-2026-44456?

CVE-2026-44456 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-44456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44456?

CVE-2026-44456 affects Hono. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44456?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-44456 have an EU (EUVD) identifier?

Yes. CVE-2026-44456 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30035.

When was CVE-2026-44456 published?

CVE-2026-44456 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-44456

CVE-2026-44456 is a medium-severity vulnerability in Hono with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30035
Weakness: CWE-400
Affected product: Hono
Published: 2026-05-13
Last modified: 2026-06-17

Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.16, bodyLimit() does not reliably enforce maxSize for requests without a usable Content-Length (e.g. Transfer-Encoding: chunked). Oversized requests can reach handlers and return 200 instead of 413. This vulnerability is fixed in 4.12.16.

Frequently asked questions

What is CVE-2026-44456?: Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.16, bodyLimit() does not reliably enforce maxSize for requests without a usable Content-Length (e.g. Transfer-Encoding: chunked). Oversized requests can reach handlers and return 200 instead of 413. This vulnerability is fixed in 4.12.16.
How severe is CVE-2026-44456?: CVE-2026-44456 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-44456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44456?: CVE-2026-44456 affects Hono. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44456?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44456 have an EU (EUVD) identifier?: Yes. CVE-2026-44456 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30035.
When was CVE-2026-44456 published?: CVE-2026-44456 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://github.com/honojs/hono/security/advisories/GHSA-9vqf-7f2p-gf9v

Affected products (1)

cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*

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