What is CVE-2026-54290?

CVE-2026-54290 is a high-severity vulnerability in Honojs Hono, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 7.1/10. Published 2026-06-22.

How severe is CVE-2026-54290?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Honojs Hono

CVE-2026-54290

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with credentials: true and no explicit origin (the default wildcard), the CORS Middleware reflects the request's Origin and sends Acces…

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N.

Affected products

Honojs Hono — versions < 4.12.25

Weakness classification (CWE)

CWE-942 — Permissive Cross-domain Policy with Untrusted Domains

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54290?: CVE-2026-54290 is a high-severity vulnerability in Honojs Hono, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 7.1/10. Published 2026-06-22.
How severe is CVE-2026-54290?: High severity. CVSS v3 base score is 7.1 out of 10.