Hono
CVE-2026-24398
MEDIUM
GHSA-r354-f388-2fhh
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Incorrect input validation
|
| Impact | CVSS 4.8 (MEDIUM). Attack vector: Network. Complexity: High. Privileges required: None. User interaction: None. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Hono's IP Restriction Middleware fails to properly validate IPv4 octet ranges, allowing attackers to bypass IP-based access controls by submitting malformed addresses with values exceeding 255. This affects all users relying on Hono's IP filtering mechanisms for authentication or authorization. A patch is available in version 4.11.7 and later.
Earlier versions of this analysis (1)
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, IP Restriction Middleware in Hono is vulnerable to an IP address validation bypass. [CVSS 4.8 MEDIUM]
RemediationAI
A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in npm
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Affects Hono. Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, IP Restriction Middleware in Hono is vulnerable to an IP address validation bypass. The IPV4_REGEX pattern and convertIPv4ToBinary function in src/utils/ipaddr.ts do not properly validate that IPv4 octet values are within the valid range of 0-255, allowing attackers to craft malformed IP addresses that bypass IP-based access controls. Version 4.11.7 contains a patch for the issue.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, IP Restriction Middleware in Hono is vulnerable to an IP address validation bypass. The IPV4_REGEX pattern and convertIPv4ToBinary function in src/utils/ipaddr.ts do not properly validate that IPv4 octet values are within the valid range of 0-255, allowing attackers to craft malformed IP addresses that bypass IP-based access controls. Version 4.11.7 contains a patch for the issue.
Blast Radius
ecosystem impact- 74 npm packages depend on hono (63 direct, 11 indirect)
Ecosystem-wide dependent count for version 4.11.7.
Executive ViewAI
Organizations using Hono should be aware of moderate risk from CVE-2026-24398 rated CVSS 4.8. Exploitation could compromise the security of affected deployments. A patch is available and should be applied during regular vulnerability management.
Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)GitHub Advisory
Improper authorization in Hono's JWT Auth Middleware (hono/jwt in the npm package 'hono', versions 1.1.0 through 4.10.1)
The adapter @hono/node-server allows you to run your Hono application on Node.js. Rated high severity (CVSS 7.5), this v
Hono, a web framework, prior to version 4.6.5 is vulnerable to bypass of cross-site request forgery (CSRF) middleware by
Quadratic-complexity denial of service in Hono's `languageDetector` middleware (versions 4.12.0-4.12.33) allows unauthen
Path prefix stripping in Hono's app.mount() API exposes mounted sub-applications to incorrect routing due to a raw-vs-de
Hono is a Web application framework that provides support for any JavaScript runtime. Rated medium severity (CVSS 5.3),
@hono/node-server is an adapter that allows users to run Hono applications on Node.js. Rated medium severity (CVSS 5.3),
Hono is a Web application framework that provides support for any JavaScript runtime. Rated medium severity (CVSS 5.0),
Cross-user HTML disclosure in Hono's server-side rendering affects all applications using hono/jsx with memo()-wrapped c
Hono is a web framework written in TypeScript. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploita
Hono is a Web application framework that provides support for any JavaScript runtime. [CVSS 8.2 HIGH]
Hono versions before 4.11.4 allow JWT algorithm confusion attacks through improper algorithm validation in the JWK/JWKS
Exploit-DB