Detections
Analytics

Echo: io.netty:netty-codec-http: security update to 4.1.136.Final

medium Tenable Self-Hosted Container Security Plugin ID 465507

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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<CharSequence>` 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. (CVE-2026-59899)

Solution

Update the io.netty:netty-codec-http library and its related packages to version 4.1.136.Final or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-59899

Plugin Details

Severity: Medium

ID: 465507

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-59899

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 7/22/2026

Reference Information

CVE: CVE-2026-59899