Improper Input Validation Affecting hono package, versions <4.12.12
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- published8 Apr 2026
- disclosed8 Apr 2026
- credittikitiki0370
Introduced: 8 Apr 2026
NewCVE-2026-39410 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
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 Improper Input Validation via the getCookie function. An attacker can override legitimate cookies and bypass prefix protections by setting cookies with non-breaking space prefixes, leading to potential session fixation or hijacking.