RHLW-2026-ebef76b1d44dd738

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    RHLW-2026-ebef76b1d44dd738

    Published: 6 Nov 2026Last Modified: 6 Nov 2026

    Summary: Lightwell Security Advisory: netty-codec-http3 4.2.13.Final-rhlw-00001

    Details: Red Hat Lightwell has released io.netty:netty-codec-http3 4.2.13.Final-rhlw-00001 with backported fixes for CVE-2026-44892, CVE-2026-48748, and CVE-2026-56816. CVE-2026-44892: Netty has a Vulnerable Default Configuration Which Leads to Denial of Service via Unbounded HTTP/3 Header Size CVE-2026-48748: Netty HTTP/3 QPACK Blocked Streams Memory Exhaustion CVE-2026-56816: Netty: Memory Exhaustion via HTTP/3 Reserved Frame Types This patched artifact is a drop-in replacement for io.netty:netty-codec-http3 4.2.13.Final-rhlw-00001 from Maven Central.

    References: https://github.com/netty/netty/releases/tag/netty-4.2.15.Final, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44892.json, https://github.com/netty/netty/security/advisories/GHSA-c2rx-5r8w-8xr2, https://nvd.nist.gov/vuln/detail/CVE-2026-44892, https://github.com/advisories/GHSA-c2rx-5r8w-8xr2, https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48748.json, https://access.redhat.com/security/cve/CVE-2026-48748, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48748.json, https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6, https://nvd.nist.gov/vuln/detail/CVE-2026-48748, https://github.com/netty/netty/commit/75127cab731ee35068d1f0667bffa188bc332f5d, https://github.com/advisories/GHSA-4grm-h2qv-h6w6, https://github.com/netty/netty/releases/tag/netty-4.2.16.Final, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56816.json, https://github.com/netty/netty/security/advisories/GHSA-hpcc-26xq-25fv, https://nvd.nist.gov/vuln/detail/CVE-2026-56816, https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b, https://github.com/advisories/GHSA-hpcc-26xq-25fv

    Affected packages

    Package

    Name: io.netty:netty-codec-http3

    Purl: pkg:maven/io.netty/netty-codec-http3

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.2.13.Final-rhlw-00001

    Affected versions

    4.2.10.Final
    4.2.11.Final
    4.2.12.Final
    4.2.13.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
    RHLW-2026-ebef76b1d44dd738 | CVE-DB