Null Byte Interaction Error (Poison Null Byte) Affecting netty package, versions *


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.25% (17th percentile)

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  • Snyk IDSNYK-ECHOLATEST-NETTY-19233518
  • published23 Aug 2026
  • disclosed22 Aug 2026

Introduced: 22 Aug 2026

CVE-2026-62380  (opens in a new tab)
CWE-626  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest netty.

NVD Description

Note: Versions mentioned in the description apply only to the upstream netty package and not the netty package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through 4.1.136.Final contain null byte, CRLF, and credential injection vulnerabilities in the SOCKS4 (Socks4ClientEncoder) and SOCKS5 (Socks5ClientEncoder) client encoders, which fail to validate domain address and authentication (username/password) fields. An attacker able to control these fields can inject null bytes or CRLF characters to truncate or alter values, potentially enabling domain spoofing, SOCKS4 userid truncation, authentication data injection, and protocol confusion. Fixed in 4.2.17.Final and 4.1.137.Final.

CVSS Base Scores

version 3.1