Improper Handling of Highly Compressed Data (Data Amplification) Affecting eap8-netty-common package, versions <0:4.1.136-1.Final_redhat_00001.1.el8eap


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.67% (50th percentile)

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  • Snyk IDSNYK-RHEL8-EAP8NETTYCOMMON-20115909
  • published24 Sept 2026
  • disclosed20 Jul 2026

Introduced: 20 Jul 2026

CVE-2026-55833  (opens in a new tab)
CWE-409  (opens in a new tab)

How to fix?

Upgrade RHEL:8 eap8-netty-common to version 0:4.1.136-1.Final_redhat_00001.1.el8eap or higher.
This issue was patched in RHSA-2026:70228.

NVD Description

Note: Versions mentioned in the description apply only to the upstream eap8-netty-common package and not the eap8-netty-common package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1