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    CVE-2026-39409

    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.

    Published:Apr 8, 2026
    Last Modified:Apr 21, 2026
    EPS:Apr 8, 2026
    EPSS Score:0.00017
    CVSS Score:5.3

    Affected Products

    Vendor
    Hono
    Product
    Hono

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-69207 (CVSS 5.3) — Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.34, the bu…
    CVE-2026-71850 (CVSS 4.8) — Hono is a Web application framework that provides support for any JavaScript runtime. From 3.8.0 to 4.12.33, m…
    CVE-2026-71849 (CVSS 3.7) — Hono is a Web application framework that provides support for any JavaScript runtime. From 4.7.0 to 4.12.33, t…
    CVE-2026-71848 (CVSS 5.3) — Hono is a Web application framework that provides support for any JavaScript runtime. From 4.12.0 to 4.12.33, …
    CVE-2026-56764 (CVSS 6.3) — Hono before 4.11.10 contains a timing attack vulnerability in the basicAuth and bearerAuth middlewares due to …
    CVE-2026-56763 (CVSS 6.3) — Hono before 4.12.7 allows __proto__ key in parseBody with dot option enabled, permitting specially crafted for…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High