Detections
Analytics

Echo: multiple io.netty:netty-codec-http packages: security update to 4.1.133.Final

high Tenable Cloud Security Plugin ID 463292

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 4.2.13.Final and
 4.1.133.Final, HttpContentDecompressor accepts a maxAllocation parameter to limit decompression buffer
 size and prevent decompression bomb attacks. This limit is correctly enforced for gzip and deflate
 encodings via ZlibDecoder, but is silently ignored when the content encoding is br (Brotli), zstd, or
 snappy. An attacker can bypass the configured decompression limit by sending a compressed payload with
 Content-Encoding: br instead of Content-Encoding: gzip, causing unbounded memory allocation and out-of-
 memory denial of service. The same vulnerability exists in DelegatingDecompressorFrameListener for HTTP/2
 connections. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final. (CVE-2026-42587)

Solution

Update the io.netty:netty-codec-http library and its related packages to version 4.1.133.Final or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-42587

Plugin Details

Severity: High

ID: 463292

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.76

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-2026-42587

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: 5/7/2026

Reference Information

CVE: CVE-2026-42587