Improper Handling of Highly Compressed Data (Data Amplification) Affecting eap8-netty-resolver-dns 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
0.61% (47th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL8-EAP8NETTYRESOLVERDNS-20115403
  • published24 Sept 2026
  • disclosed9 Jul 2026

Introduced: 9 Jul 2026

CVE-2026-59899  (opens in a new tab)
CWE-409  (opens in a new tab)

How to fix?

Upgrade RHEL:8 eap8-netty-resolver-dns 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-resolver-dns package and not the eap8-netty-resolver-dns package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder (the superclass of the production handler HttpContentCompressor) maintains a per-channel ArrayDeque&lt;CharSequence&gt; named acceptEncodingQueue that accumulates attacker-controlled data without any size limit. The queue is filled on the I/O thread for every inbound HTTP request and drained only when the application later writes a non-1xx response. This creates a resource exhaustion vulnerability when an attacker exploits HTTP/1.1 pipelining to flood the connection with requests faster than the application produces responses. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.

CVSS Base Scores

version 3.1