HTTP Response Splitting Affecting hono package, versions <4.12.12
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Test your applications- Snyk IDSNYK-JS-HONO-15928831
- published8 Apr 2026
- disclosed8 Apr 2026
- creditAthul Jayaram
Introduced: 8 Apr 2026
New CVE NOT AVAILABLE CWE-113 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade hono to version 4.12.12 or higher.
Overview
hono is an Ultrafast web framework for the Edges
Affected versions of this package are vulnerable to HTTP Response Splitting via the setCookie function. An attacker can cause runtime errors and potentially disrupt application behavior by supplying specially crafted input as the cookie name, leading to malformed Set-Cookie header values.