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I. Basic Information for CVE-2026-39409
Vulnerability Information

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Vulnerability Title
Hono has incorrect IP matching in ipRestriction() for IPv4-mapped IPv6 addresses
Source: NVD (National Vulnerability Database)
Vulnerability Description
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, ipRestriction() does not canonicalize IPv4-mapped IPv6 client addresses (e.g. ::ffff:127.0.0.1) before applying IPv4 allow or deny rules. In environments such as Node.js dual-stack, this can cause IPv4 rules to fail to match, leading to unintended authorization behavior. This vulnerability is fixed in 4.12.12.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
不正确的行为次序:规范化之前验证
Source: NVD (National Vulnerability Database)
Vulnerability Title
Hono 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hono是Hono社区的一个用 TypeScript 编写的 Web 框架。 Hono 4.12.12之前版本存在安全漏洞,该漏洞源于ipRestriction函数未规范化IPv4映射的IPv6客户端地址,可能导致IPv4规则匹配失败,引发意外授权行为。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
II. Public POCs for CVE-2026-39409
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III. Intelligence Information for CVE-2026-39409
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IV. Related Vulnerabilities
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