CVE Feed

    Dashboard / CVE / CVE-2026-55833

    CVE-2026-55833

    Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, Netty SPDY header decoding continues inflating zlib-compressed header blocks after the raw header parser has exceeded `maxHeaderSize` and marked the frame truncated in `SpdyFrameCodec`, allowing a remote peer to send a small compressed `HEADERS` block that expands into much larger raw header data and causes compression-amplified CPU and allocation churn. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.

    Published:Jul 20, 2026
    Last Modified:Jul 27, 2026
    EPS:Jul 20, 2026
    EPSS Score:0.00423
    CVSS Score:7.5

    Affected Products

    Vendor
    Netty
    Product
    Netty

    Exploits

    https://github.com/netty/netty/security/advisories/GHSA-mvh2-crg5-v77c

    Related CVEs

    CVE-2026-89044 (CVSS 6.9) — Netty versions 4.1.133.Final through 4.1.137.Final and 4.2.13.Final through 4.2.17.Final fail to properly vali…
    CVE-2026-76816 (CVSS 3.5) — Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.137.Final and 4.2.…
    CVE-2026-62380 (CVSS 6.3) — Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through 4.1.136.Final c…
    CVE-2026-62243 (CVSS 8.7) — Netty (io.netty:netty-handler) versions from 4.2.0.Final through 4.2.16.Final and versions through 4.1.136.Fin…
    CVE-2026-75595 (CVSS 9.1) — Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, …
    CVE-2026-75596 (CVSS 8.7) — Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final,…
    CVE-2026-59903 (CVSS 6.5) — Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final,…
    CVE-2026-59902 (CVSS 7.5) — Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final,…
    CVE-2026-73508 (CVSS 5.3) — Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final,…
    CVE-2026-73507 (CVSS 7.5) — Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.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