Detections
Analytics

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

high Tenable Self-Hosted Container Security Plugin ID 465355

Description

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

 - 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. (CVE-2026-55833)

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-2026-55833

Plugin Details

Severity: High

ID: 465355

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: 23.74

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-55833

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 7/20/2026

Reference Information

CVE: CVE-2026-55833