GHSA-xrhx-7g5j-rcj5 · Severity: medium · Ecosystem: npm — Hono: IP Restriction bypasses static deny rules for non-canonical IPv6
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 equality after partial normalization. Non-canonical IPv6 representations of an address already listed in a static rule — such as compressed forms, explicit-zero forms, or hex-notation IPv4-mapped addresses — do not match the normalized rule entry, causing the rule to be silently skipped. This vulnerability is fixed in 4.12.21.
Conclusion & alert: CVE-2026-47674 is rated Low Risk (26.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.24%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.06% | 0.24% | +0.18% |
| 2 | 2026-05-30 | 0.04% | 0.06% | +0.02% |
| 3 | 2026-05-29 | — | 0.04% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
GHSA-xrhx-7g5j-rcj5 · Severity: medium · Ecosystem: npm — Hono: IP Restriction bypasses static deny rules for non-canonical IPv6
| URL | Tags |
|---|---|
| https://github.com/honojs/hono/security/advisories/GHSA-xrhx-7g5j-rcj5 | Vendor Advisory |