CVE-2026-24398

MEDIUM
2026-01-27 [email protected] GHSA-r354-f388-2fhh
4.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
Patch Released
Feb 04, 2026 - 15:34 nvd
Patch available
CVE Published
Jan 27, 2026 - 19:16 nvd
MEDIUM 4.8

Tags

Authentication Bypass Hono

Description

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.

Analysis

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. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

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Priority Score

24
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +24
POC: 0

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CVE-2026-24398 vulnerability details – vuln.today
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