Detections
Analytics

Echo: io.netty:netty-codec-haproxy: security update to 4.1.135.Final

high Tenable Cloud Security Plugin ID 465063

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
 versions 4.1.135.Final and 4.2.15.Final, the HAProxy PROXY protocol v2 codec in netty leaks native or heap
 memory on every connection when a client sends a syntactically valid header containing nested
 `PP2_TYPE_SSL` TLVs (type-length-value records) at depth two or greater. The leak occurs on the successful
 parse path — no exception is thrown, the message fires downstream, the decoder removes itself, and the
 application releases the `HAProxyMessage` normally. Yet the underlying cumulation buffer (a pooled,
 potentially direct `ByteBuf` allocated by the channel) remains permanently pinned. Versions 4.1.135.Final
 and 4.2.15.Final patch the issue. (CVE-2026-48059)

Solution

Update the io.netty:netty-codec-haproxy library and its related packages to version 4.1.135.Final or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-48059

Plugin Details

Severity: High

ID: 465063

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: 23.72

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-2026-48059

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: High

Base Score: 8.7

Threat Score: 6.6

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:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 6/11/2026

Reference Information

CVE: CVE-2026-48059