What is CVE-2026-54289?

CVE-2026-54289 is a medium-severity vulnerability in Honojs Hono, classified under CWE-348. CVSS score: 4.8/10. Published 2026-06-22.

How severe is CVE-2026-54289?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Vulnerability in Honojs Hono

CVE-2026-54289

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on AWS Lambda@Edge, CloudFront delivers a request header that appears more than once as several separate entries. The adapter writes ea…

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Honojs Hono — versions < 4.12.25

Weakness classification (CWE)

CWE-348

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54289?: CVE-2026-54289 is a medium-severity vulnerability in Honojs Hono, classified under CWE-348. CVSS score: 4.8/10. Published 2026-06-22.
How severe is CVE-2026-54289?: Medium severity. CVSS v3 base score is 4.8 out of 10.