GHSA-3qp7-7mw8-wx86

    Dashboard / Vulnerabilities / GHSA-3qp7-7mw8-wx86

    GHSA-3qp7-7mw8-wx86

    Published: 8 Jun 2026Last Modified: 10 Sept 2026

    Summary: Netty has an IPv6 Subnet Filter Bypass via Incorrect Comparator Masking

    Details: ### Summary An attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. ### Details `io.netty.handler.ipfilter.IpSubnetFilterRule#compareTo(java.net.InetSocketAddress)` method performs a bitwise AND between the incoming IP address and the configured networkAddress, instead of the subnetMask. ### Impact Access Control Bypass. Attacker can bypass IpSubnetFilter IPv6 access controls.

    References: https://github.com/netty/netty/security/advisories/GHSA-3qp7-7mw8-wx86, https://nvd.nist.gov/vuln/detail/CVE-2026-44249, https://github.com/netty/netty, https://github.com/netty/netty/releases/tag/netty-4.1.135.Final, https://github.com/netty/netty/releases/tag/netty-4.2.15.Final

    Affected packages

    Package

    Name: io.netty:netty-handler

    Purl: pkg:maven/io.netty/netty-handler

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 4.2.0.Final
    Fixed -4.2.15.Final

    Affected versions

    4.2.0.Final
    4.2.1.Final
    4.2.10.Final
    4.2.11.Final
    4.2.12.Final
    4.2.13.Final
    4.2.14.Final
    4.2.2.Final
    4.2.3.Final
    4.2.4.Final
    4.2.5.Final
    4.2.6.Final
    4.2.7.Final
    4.2.8.Final
    4.2.9.Final

    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
    GHSA-3qp7-7mw8-wx86 | CVE-DB