IP Address Validation Bypass in Hono Framework by Hono

CVE-2026-24398

What is CVE-2026-24398?

CVE-2026-24398 is a vulnerability identified in the Hono framework, a web application framework that facilitates the development of applications across various JavaScript runtime environments. This particular security flaw resides within the IP Restriction Middleware of Hono prior to version 4.11.7. The vulnerability emerges from improper validation of IPv4 addresses, specifically related to the IPV4_REGEX pattern and the convertIPv4ToBinary function. This failure to adequately restrict the values of the octets allows attackers to craft malformed IP addresses that can successfully bypass IP-based access controls. The implications of this vulnerability could result in unauthorized access to protected resources and data, adversely affecting an organization’s security posture and potentially leading to data breaches.

Potential Impact of CVE-2026-24398

1. Unauthorized Access: The most significant impact of this vulnerability is the potential for unauthorized users to gain access to restricted areas of applications. By bypassing IP-based access controls, attackers could exploit sensitive functionalities, leading to exposure of confidential data.

2. Data Breaches: The ability to circumvent access restrictions could enable malicious actors to access sensitive information stored within applications built on the Hono framework. Such data breaches could compromise user privacy, intellectual property, or proprietary business information, resulting in reputational damage and financial loss.

3. Increased Attack Surface: Organizations utilizing affected versions of the Hono framework may find themselves with an exacerbated attack surface. The ease with which IP-based controls can be bypassed amplifies the risk of further exploits and malware deployment, potentially inviting a wave of ongoing security incidents and disruptions.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch →

References