What is CVE-2026-47674?

CVE-2026-47674 is a medium-severity vulnerability in Hono, classified under Incorrect Regular Expression. CVSS score: 5.3/10. Published 2026-05-28.

How severe is CVE-2026-47674?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Hono

CVE-2026-47674

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, the ip-restriction middleware (hono/ip-restriction) compares incoming IP addresses against configured deny and allow rules using string…

EPSS: 0.001 (26.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Hono
Honojs Hono — versions < 4.12.21

Weakness classification (CWE)

CWE-185 — Incorrect Regular Expression
CWE-1289

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-47674?: CVE-2026-47674 is a medium-severity vulnerability in Hono, classified under Incorrect Regular Expression. CVSS score: 5.3/10. Published 2026-05-28.
How severe is CVE-2026-47674?: Medium severity. CVSS v3 base score is 5.3 out of 10.